Index: imaps-frontend/node_modules/webpack/lib/Cache.js
===================================================================
--- imaps-frontend/node_modules/webpack/lib/Cache.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/webpack/lib/Cache.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,165 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { AsyncParallelHook, AsyncSeriesBailHook, SyncHook } = require("tapable");
+const {
+	makeWebpackError,
+	makeWebpackErrorCallback
+} = require("./HookWebpackError");
+
+/** @typedef {import("./WebpackError")} WebpackError */
+
+/**
+ * @typedef {object} Etag
+ * @property {function(): string} toString
+ */
+
+/**
+ * @template T
+ * @callback CallbackCache
+ * @param {WebpackError | null} err
+ * @param {T=} result
+ * @returns {void}
+ */
+
+/**
+ * @callback GotHandler
+ * @param {any} result
+ * @param {function(Error=): void} callback
+ * @returns {void}
+ */
+
+/**
+ * @param {number} times times
+ * @param {function(Error=): void} callback callback
+ * @returns {function(Error=): void} callback
+ */
+const needCalls = (times, callback) => err => {
+	if (--times === 0) {
+		return callback(err);
+	}
+	if (err && times > 0) {
+		times = 0;
+		return callback(err);
+	}
+};
+
+class Cache {
+	constructor() {
+		this.hooks = {
+			/** @type {AsyncSeriesBailHook<[string, Etag | null, GotHandler[]], any>} */
+			get: new AsyncSeriesBailHook(["identifier", "etag", "gotHandlers"]),
+			/** @type {AsyncParallelHook<[string, Etag | null, any]>} */
+			store: new AsyncParallelHook(["identifier", "etag", "data"]),
+			/** @type {AsyncParallelHook<[Iterable<string>]>} */
+			storeBuildDependencies: new AsyncParallelHook(["dependencies"]),
+			/** @type {SyncHook<[]>} */
+			beginIdle: new SyncHook([]),
+			/** @type {AsyncParallelHook<[]>} */
+			endIdle: new AsyncParallelHook([]),
+			/** @type {AsyncParallelHook<[]>} */
+			shutdown: new AsyncParallelHook([])
+		};
+	}
+
+	/**
+	 * @template T
+	 * @param {string} identifier the cache identifier
+	 * @param {Etag | null} etag the etag
+	 * @param {CallbackCache<T>} callback signals when the value is retrieved
+	 * @returns {void}
+	 */
+	get(identifier, etag, callback) {
+		/** @type {GotHandler[]} */
+		const gotHandlers = [];
+		this.hooks.get.callAsync(identifier, etag, gotHandlers, (err, result) => {
+			if (err) {
+				callback(makeWebpackError(err, "Cache.hooks.get"));
+				return;
+			}
+			if (result === null) {
+				result = undefined;
+			}
+			if (gotHandlers.length > 1) {
+				const innerCallback = needCalls(gotHandlers.length, () =>
+					callback(null, result)
+				);
+				for (const gotHandler of gotHandlers) {
+					gotHandler(result, innerCallback);
+				}
+			} else if (gotHandlers.length === 1) {
+				gotHandlers[0](result, () => callback(null, result));
+			} else {
+				callback(null, result);
+			}
+		});
+	}
+
+	/**
+	 * @template T
+	 * @param {string} identifier the cache identifier
+	 * @param {Etag | null} etag the etag
+	 * @param {T} data the value to store
+	 * @param {CallbackCache<void>} callback signals when the value is stored
+	 * @returns {void}
+	 */
+	store(identifier, etag, data, callback) {
+		this.hooks.store.callAsync(
+			identifier,
+			etag,
+			data,
+			makeWebpackErrorCallback(callback, "Cache.hooks.store")
+		);
+	}
+
+	/**
+	 * After this method has succeeded the cache can only be restored when build dependencies are
+	 * @param {Iterable<string>} dependencies list of all build dependencies
+	 * @param {CallbackCache<void>} callback signals when the dependencies are stored
+	 * @returns {void}
+	 */
+	storeBuildDependencies(dependencies, callback) {
+		this.hooks.storeBuildDependencies.callAsync(
+			dependencies,
+			makeWebpackErrorCallback(callback, "Cache.hooks.storeBuildDependencies")
+		);
+	}
+
+	/**
+	 * @returns {void}
+	 */
+	beginIdle() {
+		this.hooks.beginIdle.call();
+	}
+
+	/**
+	 * @param {CallbackCache<void>} callback signals when the call finishes
+	 * @returns {void}
+	 */
+	endIdle(callback) {
+		this.hooks.endIdle.callAsync(
+			makeWebpackErrorCallback(callback, "Cache.hooks.endIdle")
+		);
+	}
+
+	/**
+	 * @param {CallbackCache<void>} callback signals when the call finishes
+	 * @returns {void}
+	 */
+	shutdown(callback) {
+		this.hooks.shutdown.callAsync(
+			makeWebpackErrorCallback(callback, "Cache.hooks.shutdown")
+		);
+	}
+}
+
+Cache.STAGE_MEMORY = -10;
+Cache.STAGE_DEFAULT = 0;
+Cache.STAGE_DISK = 10;
+Cache.STAGE_NETWORK = 20;
+
+module.exports = Cache;
