Index: imaps-frontend/node_modules/webpack/lib/ChunkGroup.js
===================================================================
--- imaps-frontend/node_modules/webpack/lib/ChunkGroup.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/webpack/lib/ChunkGroup.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,604 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const util = require("util");
+const SortableSet = require("./util/SortableSet");
+const {
+	compareLocations,
+	compareChunks,
+	compareIterables
+} = require("./util/comparators");
+
+/** @typedef {import("./AsyncDependenciesBlock")} AsyncDependenciesBlock */
+/** @typedef {import("./Chunk")} Chunk */
+/** @typedef {import("./ChunkGraph")} ChunkGraph */
+/** @typedef {import("./Dependency").DependencyLocation} DependencyLocation */
+/** @typedef {import("./Entrypoint")} Entrypoint */
+/** @typedef {import("./Module")} Module */
+/** @typedef {import("./ModuleGraph")} ModuleGraph */
+
+/** @typedef {{id: number}} HasId */
+/** @typedef {{module: Module | null, loc: DependencyLocation, request: string}} OriginRecord */
+
+/**
+ * @typedef {object} RawChunkGroupOptions
+ * @property {number=} preloadOrder
+ * @property {number=} prefetchOrder
+ * @property {("low" | "high" | "auto")=} fetchPriority
+ */
+
+/** @typedef {RawChunkGroupOptions & { name?: string | null }} ChunkGroupOptions */
+
+let debugId = 5000;
+
+/**
+ * @template T
+ * @param {SortableSet<T>} set set to convert to array.
+ * @returns {T[]} the array format of existing set
+ */
+const getArray = set => Array.from(set);
+
+/**
+ * A convenience method used to sort chunks based on their id's
+ * @param {ChunkGroup} a first sorting comparator
+ * @param {ChunkGroup} b second sorting comparator
+ * @returns {1|0|-1} a sorting index to determine order
+ */
+const sortById = (a, b) => {
+	if (a.id < b.id) return -1;
+	if (b.id < a.id) return 1;
+	return 0;
+};
+
+/**
+ * @param {OriginRecord} a the first comparator in sort
+ * @param {OriginRecord} b the second comparator in sort
+ * @returns {1|-1|0} returns sorting order as index
+ */
+const sortOrigin = (a, b) => {
+	const aIdent = a.module ? a.module.identifier() : "";
+	const bIdent = b.module ? b.module.identifier() : "";
+	if (aIdent < bIdent) return -1;
+	if (aIdent > bIdent) return 1;
+	return compareLocations(a.loc, b.loc);
+};
+
+class ChunkGroup {
+	/**
+	 * Creates an instance of ChunkGroup.
+	 * @param {string | ChunkGroupOptions=} options chunk group options passed to chunkGroup
+	 */
+	constructor(options) {
+		if (typeof options === "string") {
+			options = { name: options };
+		} else if (!options) {
+			options = { name: undefined };
+		}
+		/** @type {number} */
+		this.groupDebugId = debugId++;
+		this.options = /** @type {ChunkGroupOptions} */ (options);
+		/** @type {SortableSet<ChunkGroup>} */
+		this._children = new SortableSet(undefined, sortById);
+		/** @type {SortableSet<ChunkGroup>} */
+		this._parents = new SortableSet(undefined, sortById);
+		/** @type {SortableSet<ChunkGroup>} */
+		this._asyncEntrypoints = new SortableSet(undefined, sortById);
+		this._blocks = new SortableSet();
+		/** @type {Chunk[]} */
+		this.chunks = [];
+		/** @type {OriginRecord[]} */
+		this.origins = [];
+		/** Indices in top-down order */
+		/**
+		 * @private
+		 * @type {Map<Module, number>}
+		 */
+		this._modulePreOrderIndices = new Map();
+		/** Indices in bottom-up order */
+		/**
+		 * @private
+		 * @type {Map<Module, number>}
+		 */
+		this._modulePostOrderIndices = new Map();
+		/** @type {number | undefined} */
+		this.index = undefined;
+	}
+
+	/**
+	 * when a new chunk is added to a chunkGroup, addingOptions will occur.
+	 * @param {ChunkGroupOptions} options the chunkGroup options passed to addOptions
+	 * @returns {void}
+	 */
+	addOptions(options) {
+		for (const _key of Object.keys(options)) {
+			const key = /** @type {keyof ChunkGroupOptions} */ (_key);
+			if (this.options[key] === undefined) {
+				/** @type {TODO} */
+				(this.options)[key] = options[key];
+			} else if (this.options[key] !== options[key]) {
+				if (key.endsWith("Order")) {
+					/** @type {TODO} */
+					(this.options)[key] = Math.max(
+						/** @type {number} */ (this.options[key]),
+						/** @type {number} */ (options[key])
+					);
+				} else {
+					throw new Error(
+						`ChunkGroup.addOptions: No option merge strategy for ${key}`
+					);
+				}
+			}
+		}
+	}
+
+	/**
+	 * returns the name of current ChunkGroup
+	 * @returns {string | null | undefined} returns the ChunkGroup name
+	 */
+	get name() {
+		return this.options.name;
+	}
+
+	/**
+	 * sets a new name for current ChunkGroup
+	 * @param {string | undefined} value the new name for ChunkGroup
+	 * @returns {void}
+	 */
+	set name(value) {
+		this.options.name = value;
+	}
+
+	/* istanbul ignore next */
+	/**
+	 * get a uniqueId for ChunkGroup, made up of its member Chunk debugId's
+	 * @returns {string} a unique concatenation of chunk debugId's
+	 */
+	get debugId() {
+		return Array.from(this.chunks, x => x.debugId).join("+");
+	}
+
+	/**
+	 * get a unique id for ChunkGroup, made up of its member Chunk id's
+	 * @returns {string} a unique concatenation of chunk ids
+	 */
+	get id() {
+		return Array.from(this.chunks, x => x.id).join("+");
+	}
+
+	/**
+	 * Performs an unshift of a specific chunk
+	 * @param {Chunk} chunk chunk being unshifted
+	 * @returns {boolean} returns true if attempted chunk shift is accepted
+	 */
+	unshiftChunk(chunk) {
+		const oldIdx = this.chunks.indexOf(chunk);
+		if (oldIdx > 0) {
+			this.chunks.splice(oldIdx, 1);
+			this.chunks.unshift(chunk);
+		} else if (oldIdx < 0) {
+			this.chunks.unshift(chunk);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * inserts a chunk before another existing chunk in group
+	 * @param {Chunk} chunk Chunk being inserted
+	 * @param {Chunk} before Placeholder/target chunk marking new chunk insertion point
+	 * @returns {boolean} return true if insertion was successful
+	 */
+	insertChunk(chunk, before) {
+		const oldIdx = this.chunks.indexOf(chunk);
+		const idx = this.chunks.indexOf(before);
+		if (idx < 0) {
+			throw new Error("before chunk not found");
+		}
+		if (oldIdx >= 0 && oldIdx > idx) {
+			this.chunks.splice(oldIdx, 1);
+			this.chunks.splice(idx, 0, chunk);
+		} else if (oldIdx < 0) {
+			this.chunks.splice(idx, 0, chunk);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * add a chunk into ChunkGroup. Is pushed on or prepended
+	 * @param {Chunk} chunk chunk being pushed into ChunkGroupS
+	 * @returns {boolean} returns true if chunk addition was successful.
+	 */
+	pushChunk(chunk) {
+		const oldIdx = this.chunks.indexOf(chunk);
+		if (oldIdx >= 0) {
+			return false;
+		}
+		this.chunks.push(chunk);
+		return true;
+	}
+
+	/**
+	 * @param {Chunk} oldChunk chunk to be replaced
+	 * @param {Chunk} newChunk New chunk that will be replaced with
+	 * @returns {boolean | undefined} returns true if the replacement was successful
+	 */
+	replaceChunk(oldChunk, newChunk) {
+		const oldIdx = this.chunks.indexOf(oldChunk);
+		if (oldIdx < 0) return false;
+		const newIdx = this.chunks.indexOf(newChunk);
+		if (newIdx < 0) {
+			this.chunks[oldIdx] = newChunk;
+			return true;
+		}
+		if (newIdx < oldIdx) {
+			this.chunks.splice(oldIdx, 1);
+			return true;
+		} else if (newIdx !== oldIdx) {
+			this.chunks[oldIdx] = newChunk;
+			this.chunks.splice(newIdx, 1);
+			return true;
+		}
+	}
+
+	/**
+	 * @param {Chunk} chunk chunk to remove
+	 * @returns {boolean} returns true if chunk was removed
+	 */
+	removeChunk(chunk) {
+		const idx = this.chunks.indexOf(chunk);
+		if (idx >= 0) {
+			this.chunks.splice(idx, 1);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * @returns {boolean} true, when this chunk group will be loaded on initial page load
+	 */
+	isInitial() {
+		return false;
+	}
+
+	/**
+	 * @param {ChunkGroup} group chunk group to add
+	 * @returns {boolean} returns true if chunk group was added
+	 */
+	addChild(group) {
+		const size = this._children.size;
+		this._children.add(group);
+		return size !== this._children.size;
+	}
+
+	/**
+	 * @returns {ChunkGroup[]} returns the children of this group
+	 */
+	getChildren() {
+		return this._children.getFromCache(getArray);
+	}
+
+	getNumberOfChildren() {
+		return this._children.size;
+	}
+
+	get childrenIterable() {
+		return this._children;
+	}
+
+	/**
+	 * @param {ChunkGroup} group the chunk group to remove
+	 * @returns {boolean} returns true if the chunk group was removed
+	 */
+	removeChild(group) {
+		if (!this._children.has(group)) {
+			return false;
+		}
+
+		this._children.delete(group);
+		group.removeParent(this);
+		return true;
+	}
+
+	/**
+	 * @param {ChunkGroup} parentChunk the parent group to be added into
+	 * @returns {boolean} returns true if this chunk group was added to the parent group
+	 */
+	addParent(parentChunk) {
+		if (!this._parents.has(parentChunk)) {
+			this._parents.add(parentChunk);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * @returns {ChunkGroup[]} returns the parents of this group
+	 */
+	getParents() {
+		return this._parents.getFromCache(getArray);
+	}
+
+	getNumberOfParents() {
+		return this._parents.size;
+	}
+
+	/**
+	 * @param {ChunkGroup} parent the parent group
+	 * @returns {boolean} returns true if the parent group contains this group
+	 */
+	hasParent(parent) {
+		return this._parents.has(parent);
+	}
+
+	get parentsIterable() {
+		return this._parents;
+	}
+
+	/**
+	 * @param {ChunkGroup} chunkGroup the parent group
+	 * @returns {boolean} returns true if this group has been removed from the parent
+	 */
+	removeParent(chunkGroup) {
+		if (this._parents.delete(chunkGroup)) {
+			chunkGroup.removeChild(this);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * @param {Entrypoint} entrypoint entrypoint to add
+	 * @returns {boolean} returns true if entrypoint was added
+	 */
+	addAsyncEntrypoint(entrypoint) {
+		const size = this._asyncEntrypoints.size;
+		this._asyncEntrypoints.add(entrypoint);
+		return size !== this._asyncEntrypoints.size;
+	}
+
+	get asyncEntrypointsIterable() {
+		return this._asyncEntrypoints;
+	}
+
+	/**
+	 * @returns {Array<AsyncDependenciesBlock>} an array containing the blocks
+	 */
+	getBlocks() {
+		return this._blocks.getFromCache(getArray);
+	}
+
+	getNumberOfBlocks() {
+		return this._blocks.size;
+	}
+
+	/**
+	 * @param {AsyncDependenciesBlock} block block
+	 * @returns {boolean} true, if block exists
+	 */
+	hasBlock(block) {
+		return this._blocks.has(block);
+	}
+
+	/**
+	 * @returns {Iterable<AsyncDependenciesBlock>} blocks
+	 */
+	get blocksIterable() {
+		return this._blocks;
+	}
+
+	/**
+	 * @param {AsyncDependenciesBlock} block a block
+	 * @returns {boolean} false, if block was already added
+	 */
+	addBlock(block) {
+		if (!this._blocks.has(block)) {
+			this._blocks.add(block);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * @param {Module | null} module origin module
+	 * @param {DependencyLocation} loc location of the reference in the origin module
+	 * @param {string} request request name of the reference
+	 * @returns {void}
+	 */
+	addOrigin(module, loc, request) {
+		this.origins.push({
+			module,
+			loc,
+			request
+		});
+	}
+
+	/**
+	 * @returns {string[]} the files contained this chunk group
+	 */
+	getFiles() {
+		const files = new Set();
+
+		for (const chunk of this.chunks) {
+			for (const file of chunk.files) {
+				files.add(file);
+			}
+		}
+
+		return Array.from(files);
+	}
+
+	/**
+	 * @returns {void}
+	 */
+	remove() {
+		// cleanup parents
+		for (const parentChunkGroup of this._parents) {
+			// remove this chunk from its parents
+			parentChunkGroup._children.delete(this);
+
+			// cleanup "sub chunks"
+			for (const chunkGroup of this._children) {
+				/**
+				 * remove this chunk as "intermediary" and connect
+				 * it "sub chunks" and parents directly
+				 */
+				// add parent to each "sub chunk"
+				chunkGroup.addParent(parentChunkGroup);
+				// add "sub chunk" to parent
+				parentChunkGroup.addChild(chunkGroup);
+			}
+		}
+
+		/**
+		 * we need to iterate again over the children
+		 * to remove this from the child's parents.
+		 * This can not be done in the above loop
+		 * as it is not guaranteed that `this._parents` contains anything.
+		 */
+		for (const chunkGroup of this._children) {
+			// remove this as parent of every "sub chunk"
+			chunkGroup._parents.delete(this);
+		}
+
+		// remove chunks
+		for (const chunk of this.chunks) {
+			chunk.removeGroup(this);
+		}
+	}
+
+	sortItems() {
+		this.origins.sort(sortOrigin);
+	}
+
+	/**
+	 * Sorting predicate which allows current ChunkGroup to be compared against another.
+	 * Sorting values are based off of number of chunks in ChunkGroup.
+	 * @param {ChunkGraph} chunkGraph the chunk graph
+	 * @param {ChunkGroup} otherGroup the chunkGroup to compare this against
+	 * @returns {-1|0|1} sort position for comparison
+	 */
+	compareTo(chunkGraph, otherGroup) {
+		if (this.chunks.length > otherGroup.chunks.length) return -1;
+		if (this.chunks.length < otherGroup.chunks.length) return 1;
+		return compareIterables(compareChunks(chunkGraph))(
+			this.chunks,
+			otherGroup.chunks
+		);
+	}
+
+	/**
+	 * @param {ModuleGraph} moduleGraph the module graph
+	 * @param {ChunkGraph} chunkGraph the chunk graph
+	 * @returns {Record<string, ChunkGroup[]>} mapping from children type to ordered list of ChunkGroups
+	 */
+	getChildrenByOrders(moduleGraph, chunkGraph) {
+		/** @type {Map<string, {order: number, group: ChunkGroup}[]>} */
+		const lists = new Map();
+		for (const childGroup of this._children) {
+			for (const key of Object.keys(childGroup.options)) {
+				if (key.endsWith("Order")) {
+					const name = key.slice(0, key.length - "Order".length);
+					let list = lists.get(name);
+					if (list === undefined) {
+						lists.set(name, (list = []));
+					}
+					list.push({
+						order:
+							/** @type {number} */
+							(
+								childGroup.options[/** @type {keyof ChunkGroupOptions} */ (key)]
+							),
+						group: childGroup
+					});
+				}
+			}
+		}
+		/** @type {Record<string, ChunkGroup[]>} */
+		const result = Object.create(null);
+		for (const [name, list] of lists) {
+			list.sort((a, b) => {
+				const cmp = b.order - a.order;
+				if (cmp !== 0) return cmp;
+				return a.group.compareTo(chunkGraph, b.group);
+			});
+			result[name] = list.map(i => i.group);
+		}
+		return result;
+	}
+
+	/**
+	 * Sets the top-down index of a module in this ChunkGroup
+	 * @param {Module} module module for which the index should be set
+	 * @param {number} index the index of the module
+	 * @returns {void}
+	 */
+	setModulePreOrderIndex(module, index) {
+		this._modulePreOrderIndices.set(module, index);
+	}
+
+	/**
+	 * Gets the top-down index of a module in this ChunkGroup
+	 * @param {Module} module the module
+	 * @returns {number | undefined} index
+	 */
+	getModulePreOrderIndex(module) {
+		return this._modulePreOrderIndices.get(module);
+	}
+
+	/**
+	 * Sets the bottom-up index of a module in this ChunkGroup
+	 * @param {Module} module module for which the index should be set
+	 * @param {number} index the index of the module
+	 * @returns {void}
+	 */
+	setModulePostOrderIndex(module, index) {
+		this._modulePostOrderIndices.set(module, index);
+	}
+
+	/**
+	 * Gets the bottom-up index of a module in this ChunkGroup
+	 * @param {Module} module the module
+	 * @returns {number | undefined} index
+	 */
+	getModulePostOrderIndex(module) {
+		return this._modulePostOrderIndices.get(module);
+	}
+
+	/* istanbul ignore next */
+	checkConstraints() {
+		const chunk = this;
+		for (const child of chunk._children) {
+			if (!child._parents.has(chunk)) {
+				throw new Error(
+					`checkConstraints: child missing parent ${chunk.debugId} -> ${child.debugId}`
+				);
+			}
+		}
+		for (const parentChunk of chunk._parents) {
+			if (!parentChunk._children.has(chunk)) {
+				throw new Error(
+					`checkConstraints: parent missing child ${parentChunk.debugId} <- ${chunk.debugId}`
+				);
+			}
+		}
+	}
+}
+
+ChunkGroup.prototype.getModuleIndex = util.deprecate(
+	ChunkGroup.prototype.getModulePreOrderIndex,
+	"ChunkGroup.getModuleIndex was renamed to getModulePreOrderIndex",
+	"DEP_WEBPACK_CHUNK_GROUP_GET_MODULE_INDEX"
+);
+
+ChunkGroup.prototype.getModuleIndex2 = util.deprecate(
+	ChunkGroup.prototype.getModulePostOrderIndex,
+	"ChunkGroup.getModuleIndex2 was renamed to getModulePostOrderIndex",
+	"DEP_WEBPACK_CHUNK_GROUP_GET_MODULE_INDEX_2"
+);
+
+module.exports = ChunkGroup;
