Index: imaps-frontend/node_modules/webpack/lib/MultiCompiler.js
===================================================================
--- imaps-frontend/node_modules/webpack/lib/MultiCompiler.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/webpack/lib/MultiCompiler.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,659 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const asyncLib = require("neo-async");
+const { SyncHook, MultiHook } = require("tapable");
+
+const ConcurrentCompilationError = require("./ConcurrentCompilationError");
+const MultiStats = require("./MultiStats");
+const MultiWatching = require("./MultiWatching");
+const WebpackError = require("./WebpackError");
+const ArrayQueue = require("./util/ArrayQueue");
+
+/** @template T @typedef {import("tapable").AsyncSeriesHook<T>} AsyncSeriesHook<T> */
+/** @template T @template R @typedef {import("tapable").SyncBailHook<T, R>} SyncBailHook<T, R> */
+/** @typedef {import("../declarations/WebpackOptions").WatchOptions} WatchOptions */
+/** @typedef {import("./Compiler")} Compiler */
+/** @typedef {import("./Stats")} Stats */
+/** @typedef {import("./Watching")} Watching */
+/** @typedef {import("./logging/Logger").Logger} Logger */
+/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */
+/** @typedef {import("./util/fs").IntermediateFileSystem} IntermediateFileSystem */
+/** @typedef {import("./util/fs").OutputFileSystem} OutputFileSystem */
+/** @typedef {import("./util/fs").WatchFileSystem} WatchFileSystem */
+
+/**
+ * @template T
+ * @callback Callback
+ * @param {Error | null} err
+ * @param {T=} result
+ */
+
+/**
+ * @callback RunWithDependenciesHandler
+ * @param {Compiler} compiler
+ * @param {Callback<MultiStats>} callback
+ */
+
+/**
+ * @typedef {object} MultiCompilerOptions
+ * @property {number=} parallelism how many Compilers are allows to run at the same time in parallel
+ */
+
+module.exports = class MultiCompiler {
+	/**
+	 * @param {Compiler[] | Record<string, Compiler>} compilers child compilers
+	 * @param {MultiCompilerOptions} options options
+	 */
+	constructor(compilers, options) {
+		if (!Array.isArray(compilers)) {
+			/** @type {Compiler[]} */
+			compilers = Object.keys(compilers).map(name => {
+				/** @type {Record<string, Compiler>} */
+				(compilers)[name].name = name;
+				return /** @type {Record<string, Compiler>} */ (compilers)[name];
+			});
+		}
+
+		this.hooks = Object.freeze({
+			/** @type {SyncHook<[MultiStats]>} */
+			done: new SyncHook(["stats"]),
+			/** @type {MultiHook<SyncHook<[string | null, number]>>} */
+			invalid: new MultiHook(compilers.map(c => c.hooks.invalid)),
+			/** @type {MultiHook<AsyncSeriesHook<[Compiler]>>} */
+			run: new MultiHook(compilers.map(c => c.hooks.run)),
+			/** @type {SyncHook<[]>} */
+			watchClose: new SyncHook([]),
+			/** @type {MultiHook<AsyncSeriesHook<[Compiler]>>} */
+			watchRun: new MultiHook(compilers.map(c => c.hooks.watchRun)),
+			/** @type {MultiHook<SyncBailHook<[string, string, any[]], true>>} */
+			infrastructureLog: new MultiHook(
+				compilers.map(c => c.hooks.infrastructureLog)
+			)
+		});
+		this.compilers = compilers;
+		/** @type {MultiCompilerOptions} */
+		this._options = {
+			parallelism: options.parallelism || Infinity
+		};
+		/** @type {WeakMap<Compiler, string[]>} */
+		this.dependencies = new WeakMap();
+		this.running = false;
+
+		/** @type {(Stats | null)[]} */
+		const compilerStats = this.compilers.map(() => null);
+		let doneCompilers = 0;
+		for (let index = 0; index < this.compilers.length; index++) {
+			const compiler = this.compilers[index];
+			const compilerIndex = index;
+			let compilerDone = false;
+			// eslint-disable-next-line no-loop-func
+			compiler.hooks.done.tap("MultiCompiler", stats => {
+				if (!compilerDone) {
+					compilerDone = true;
+					doneCompilers++;
+				}
+				compilerStats[compilerIndex] = stats;
+				if (doneCompilers === this.compilers.length) {
+					this.hooks.done.call(
+						new MultiStats(/** @type {Stats[]} */ (compilerStats))
+					);
+				}
+			});
+			// eslint-disable-next-line no-loop-func
+			compiler.hooks.invalid.tap("MultiCompiler", () => {
+				if (compilerDone) {
+					compilerDone = false;
+					doneCompilers--;
+				}
+			});
+		}
+		this._validateCompilersOptions();
+	}
+
+	_validateCompilersOptions() {
+		if (this.compilers.length < 2) return;
+		/**
+		 * @param {Compiler} compiler compiler
+		 * @param {WebpackError} warning warning
+		 */
+		const addWarning = (compiler, warning) => {
+			compiler.hooks.thisCompilation.tap("MultiCompiler", compilation => {
+				compilation.warnings.push(warning);
+			});
+		};
+		const cacheNames = new Set();
+		for (const compiler of this.compilers) {
+			if (compiler.options.cache && "name" in compiler.options.cache) {
+				const name = compiler.options.cache.name;
+				if (cacheNames.has(name)) {
+					addWarning(
+						compiler,
+						new WebpackError(
+							`${
+								compiler.name
+									? `Compiler with name "${compiler.name}" doesn't use unique cache name. `
+									: ""
+							}Please set unique "cache.name" option. Name "${name}" already used.`
+						)
+					);
+				} else {
+					cacheNames.add(name);
+				}
+			}
+		}
+	}
+
+	get options() {
+		return Object.assign(
+			this.compilers.map(c => c.options),
+			this._options
+		);
+	}
+
+	get outputPath() {
+		let commonPath = this.compilers[0].outputPath;
+		for (const compiler of this.compilers) {
+			while (
+				compiler.outputPath.indexOf(commonPath) !== 0 &&
+				/[/\\]/.test(commonPath)
+			) {
+				commonPath = commonPath.replace(/[/\\][^/\\]*$/, "");
+			}
+		}
+
+		if (!commonPath && this.compilers[0].outputPath[0] === "/") return "/";
+		return commonPath;
+	}
+
+	get inputFileSystem() {
+		throw new Error("Cannot read inputFileSystem of a MultiCompiler");
+	}
+
+	/**
+	 * @param {InputFileSystem} value the new input file system
+	 */
+	set inputFileSystem(value) {
+		for (const compiler of this.compilers) {
+			compiler.inputFileSystem = value;
+		}
+	}
+
+	get outputFileSystem() {
+		throw new Error("Cannot read outputFileSystem of a MultiCompiler");
+	}
+
+	/**
+	 * @param {OutputFileSystem} value the new output file system
+	 */
+	set outputFileSystem(value) {
+		for (const compiler of this.compilers) {
+			compiler.outputFileSystem = value;
+		}
+	}
+
+	get watchFileSystem() {
+		throw new Error("Cannot read watchFileSystem of a MultiCompiler");
+	}
+
+	/**
+	 * @param {WatchFileSystem} value the new watch file system
+	 */
+	set watchFileSystem(value) {
+		for (const compiler of this.compilers) {
+			compiler.watchFileSystem = value;
+		}
+	}
+
+	/**
+	 * @param {IntermediateFileSystem} value the new intermediate file system
+	 */
+	set intermediateFileSystem(value) {
+		for (const compiler of this.compilers) {
+			compiler.intermediateFileSystem = value;
+		}
+	}
+
+	get intermediateFileSystem() {
+		throw new Error("Cannot read outputFileSystem of a MultiCompiler");
+	}
+
+	/**
+	 * @param {string | (function(): string)} name name of the logger, or function called once to get the logger name
+	 * @returns {Logger} a logger with that name
+	 */
+	getInfrastructureLogger(name) {
+		return this.compilers[0].getInfrastructureLogger(name);
+	}
+
+	/**
+	 * @param {Compiler} compiler the child compiler
+	 * @param {string[]} dependencies its dependencies
+	 * @returns {void}
+	 */
+	setDependencies(compiler, dependencies) {
+		this.dependencies.set(compiler, dependencies);
+	}
+
+	/**
+	 * @param {Callback<MultiStats>} callback signals when the validation is complete
+	 * @returns {boolean} true if the dependencies are valid
+	 */
+	validateDependencies(callback) {
+		/** @type {Set<{source: Compiler, target: Compiler}>} */
+		const edges = new Set();
+		/** @type {string[]} */
+		const missing = [];
+		/**
+		 * @param {Compiler} compiler compiler
+		 * @returns {boolean} target was found
+		 */
+		const targetFound = compiler => {
+			for (const edge of edges) {
+				if (edge.target === compiler) {
+					return true;
+				}
+			}
+			return false;
+		};
+		/**
+		 * @param {{source: Compiler, target: Compiler}} e1 edge 1
+		 * @param {{source: Compiler, target: Compiler}} e2 edge 2
+		 * @returns {number} result
+		 */
+		const sortEdges = (e1, e2) =>
+			/** @type {string} */
+			(e1.source.name).localeCompare(/** @type {string} */ (e2.source.name)) ||
+			/** @type {string} */
+			(e1.target.name).localeCompare(/** @type {string} */ (e2.target.name));
+		for (const source of this.compilers) {
+			const dependencies = this.dependencies.get(source);
+			if (dependencies) {
+				for (const dep of dependencies) {
+					const target = this.compilers.find(c => c.name === dep);
+					if (!target) {
+						missing.push(dep);
+					} else {
+						edges.add({
+							source,
+							target
+						});
+					}
+				}
+			}
+		}
+		/** @type {string[]} */
+		const errors = missing.map(m => `Compiler dependency \`${m}\` not found.`);
+		const stack = this.compilers.filter(c => !targetFound(c));
+		while (stack.length > 0) {
+			const current = stack.pop();
+			for (const edge of edges) {
+				if (edge.source === current) {
+					edges.delete(edge);
+					const target = edge.target;
+					if (!targetFound(target)) {
+						stack.push(target);
+					}
+				}
+			}
+		}
+		if (edges.size > 0) {
+			/** @type {string[]} */
+			const lines = Array.from(edges)
+				.sort(sortEdges)
+				.map(edge => `${edge.source.name} -> ${edge.target.name}`);
+			lines.unshift("Circular dependency found in compiler dependencies.");
+			errors.unshift(lines.join("\n"));
+		}
+		if (errors.length > 0) {
+			const message = errors.join("\n");
+			callback(new Error(message));
+			return false;
+		}
+		return true;
+	}
+
+	// TODO webpack 6 remove
+	/**
+	 * @deprecated This method should have been private
+	 * @param {Compiler[]} compilers the child compilers
+	 * @param {RunWithDependenciesHandler} fn a handler to run for each compiler
+	 * @param {Callback<MultiStats>} callback the compiler's handler
+	 * @returns {void}
+	 */
+	runWithDependencies(compilers, fn, callback) {
+		const fulfilledNames = new Set();
+		let remainingCompilers = compilers;
+		/**
+		 * @param {string} d dependency
+		 * @returns {boolean} when dependency was fulfilled
+		 */
+		const isDependencyFulfilled = d => fulfilledNames.has(d);
+		/**
+		 * @returns {Compiler[]} compilers
+		 */
+		const getReadyCompilers = () => {
+			const readyCompilers = [];
+			const list = remainingCompilers;
+			remainingCompilers = [];
+			for (const c of list) {
+				const dependencies = this.dependencies.get(c);
+				const ready =
+					!dependencies || dependencies.every(isDependencyFulfilled);
+				if (ready) {
+					readyCompilers.push(c);
+				} else {
+					remainingCompilers.push(c);
+				}
+			}
+			return readyCompilers;
+		};
+		/**
+		 * @param {Callback<MultiStats>} callback callback
+		 * @returns {void}
+		 */
+		const runCompilers = callback => {
+			if (remainingCompilers.length === 0) return callback(null);
+			asyncLib.map(
+				getReadyCompilers(),
+				(compiler, callback) => {
+					fn(compiler, err => {
+						if (err) return callback(err);
+						fulfilledNames.add(compiler.name);
+						runCompilers(callback);
+					});
+				},
+				(err, results) => {
+					callback(err, /** @type {TODO} */ (results));
+				}
+			);
+		};
+		runCompilers(callback);
+	}
+
+	/**
+	 * @template SetupResult
+	 * @param {function(Compiler, number, Callback<Stats>, function(): boolean, function(): void, function(): void): SetupResult} setup setup a single compiler
+	 * @param {function(Compiler, SetupResult, Callback<Stats>): void} run run/continue a single compiler
+	 * @param {Callback<MultiStats>} callback callback when all compilers are done, result includes Stats of all changed compilers
+	 * @returns {SetupResult[]} result of setup
+	 */
+	_runGraph(setup, run, callback) {
+		/** @typedef {{ compiler: Compiler, setupResult: undefined | SetupResult, result: undefined | Stats, state: "pending" | "blocked" | "queued" | "starting" | "running" | "running-outdated" | "done", children: Node[], parents: Node[] }} Node */
+
+		// State transitions for nodes:
+		// -> blocked (initial)
+		// blocked -> starting [running++] (when all parents done)
+		// queued -> starting [running++] (when processing the queue)
+		// starting -> running (when run has been called)
+		// running -> done [running--] (when compilation is done)
+		// done -> pending (when invalidated from file change)
+		// pending -> blocked [add to queue] (when invalidated from aggregated changes)
+		// done -> blocked [add to queue] (when invalidated, from parent invalidation)
+		// running -> running-outdated (when invalidated, either from change or parent invalidation)
+		// running-outdated -> blocked [running--] (when compilation is done)
+
+		/** @type {Node[]} */
+		const nodes = this.compilers.map(compiler => ({
+			compiler,
+			setupResult: undefined,
+			result: undefined,
+			state: "blocked",
+			children: [],
+			parents: []
+		}));
+		/** @type {Map<string, Node>} */
+		const compilerToNode = new Map();
+		for (const node of nodes) {
+			compilerToNode.set(/** @type {string} */ (node.compiler.name), node);
+		}
+		for (const node of nodes) {
+			const dependencies = this.dependencies.get(node.compiler);
+			if (!dependencies) continue;
+			for (const dep of dependencies) {
+				const parent = /** @type {Node} */ (compilerToNode.get(dep));
+				node.parents.push(parent);
+				parent.children.push(node);
+			}
+		}
+		/** @type {ArrayQueue<Node>} */
+		const queue = new ArrayQueue();
+		for (const node of nodes) {
+			if (node.parents.length === 0) {
+				node.state = "queued";
+				queue.enqueue(node);
+			}
+		}
+		let errored = false;
+		let running = 0;
+		const parallelism = /** @type {number} */ (this._options.parallelism);
+		/**
+		 * @param {Node} node node
+		 * @param {(Error | null)=} err error
+		 * @param {Stats=} stats result
+		 * @returns {void}
+		 */
+		const nodeDone = (node, err, stats) => {
+			if (errored) return;
+			if (err) {
+				errored = true;
+				return asyncLib.each(
+					nodes,
+					(node, callback) => {
+						if (node.compiler.watching) {
+							node.compiler.watching.close(callback);
+						} else {
+							callback();
+						}
+					},
+					() => callback(err)
+				);
+			}
+			node.result = stats;
+			running--;
+			if (node.state === "running") {
+				node.state = "done";
+				for (const child of node.children) {
+					if (child.state === "blocked") queue.enqueue(child);
+				}
+			} else if (node.state === "running-outdated") {
+				node.state = "blocked";
+				queue.enqueue(node);
+			}
+			processQueue();
+		};
+		/**
+		 * @param {Node} node node
+		 * @returns {void}
+		 */
+		const nodeInvalidFromParent = node => {
+			if (node.state === "done") {
+				node.state = "blocked";
+			} else if (node.state === "running") {
+				node.state = "running-outdated";
+			}
+			for (const child of node.children) {
+				nodeInvalidFromParent(child);
+			}
+		};
+		/**
+		 * @param {Node} node node
+		 * @returns {void}
+		 */
+		const nodeInvalid = node => {
+			if (node.state === "done") {
+				node.state = "pending";
+			} else if (node.state === "running") {
+				node.state = "running-outdated";
+			}
+			for (const child of node.children) {
+				nodeInvalidFromParent(child);
+			}
+		};
+		/**
+		 * @param {Node} node node
+		 * @returns {void}
+		 */
+		const nodeChange = node => {
+			nodeInvalid(node);
+			if (node.state === "pending") {
+				node.state = "blocked";
+			}
+			if (node.state === "blocked") {
+				queue.enqueue(node);
+				processQueue();
+			}
+		};
+
+		/** @type {SetupResult[]} */
+		const setupResults = [];
+		for (const [i, node] of nodes.entries()) {
+			setupResults.push(
+				(node.setupResult = setup(
+					node.compiler,
+					i,
+					nodeDone.bind(null, node),
+					() => node.state !== "starting" && node.state !== "running",
+					() => nodeChange(node),
+					() => nodeInvalid(node)
+				))
+			);
+		}
+		let processing = true;
+		const processQueue = () => {
+			if (processing) return;
+			processing = true;
+			process.nextTick(processQueueWorker);
+		};
+		const processQueueWorker = () => {
+			// eslint-disable-next-line no-unmodified-loop-condition
+			while (running < parallelism && queue.length > 0 && !errored) {
+				const node = /** @type {Node} */ (queue.dequeue());
+				if (
+					node.state === "queued" ||
+					(node.state === "blocked" &&
+						node.parents.every(p => p.state === "done"))
+				) {
+					running++;
+					node.state = "starting";
+					run(
+						node.compiler,
+						/** @type {SetupResult} */ (node.setupResult),
+						nodeDone.bind(null, node)
+					);
+					node.state = "running";
+				}
+			}
+			processing = false;
+			if (
+				!errored &&
+				running === 0 &&
+				nodes.every(node => node.state === "done")
+			) {
+				const stats = [];
+				for (const node of nodes) {
+					const result = node.result;
+					if (result) {
+						node.result = undefined;
+						stats.push(result);
+					}
+				}
+				if (stats.length > 0) {
+					callback(null, new MultiStats(stats));
+				}
+			}
+		};
+		processQueueWorker();
+		return setupResults;
+	}
+
+	/**
+	 * @param {WatchOptions|WatchOptions[]} watchOptions the watcher's options
+	 * @param {Callback<MultiStats>} handler signals when the call finishes
+	 * @returns {MultiWatching} a compiler watcher
+	 */
+	watch(watchOptions, handler) {
+		if (this.running) {
+			return handler(new ConcurrentCompilationError());
+		}
+		this.running = true;
+
+		if (this.validateDependencies(handler)) {
+			const watchings = this._runGraph(
+				(compiler, idx, callback, isBlocked, setChanged, setInvalid) => {
+					const watching = compiler.watch(
+						Array.isArray(watchOptions) ? watchOptions[idx] : watchOptions,
+						callback
+					);
+					if (watching) {
+						watching._onInvalid = setInvalid;
+						watching._onChange = setChanged;
+						watching._isBlocked = isBlocked;
+					}
+					return watching;
+				},
+				(compiler, watching, callback) => {
+					if (compiler.watching !== watching) return;
+					if (!watching.running) watching.invalidate();
+				},
+				handler
+			);
+			return new MultiWatching(watchings, this);
+		}
+
+		return new MultiWatching([], this);
+	}
+
+	/**
+	 * @param {Callback<MultiStats>} callback signals when the call finishes
+	 * @returns {void}
+	 */
+	run(callback) {
+		if (this.running) {
+			return callback(new ConcurrentCompilationError());
+		}
+		this.running = true;
+
+		if (this.validateDependencies(callback)) {
+			this._runGraph(
+				() => {},
+				(compiler, setupResult, callback) => compiler.run(callback),
+				(err, stats) => {
+					this.running = false;
+
+					if (callback !== undefined) {
+						return callback(err, stats);
+					}
+				}
+			);
+		}
+	}
+
+	purgeInputFileSystem() {
+		for (const compiler of this.compilers) {
+			if (compiler.inputFileSystem && compiler.inputFileSystem.purge) {
+				compiler.inputFileSystem.purge();
+			}
+		}
+	}
+
+	/**
+	 * @param {Callback<void>} callback signals when the compiler closes
+	 * @returns {void}
+	 */
+	close(callback) {
+		asyncLib.each(
+			this.compilers,
+			(compiler, callback) => {
+				compiler.close(callback);
+			},
+			error => {
+				callback(error);
+			}
+		);
+	}
+};
