Index: imaps-frontend/node_modules/webpack/lib/validateSchema.js
===================================================================
--- imaps-frontend/node_modules/webpack/lib/validateSchema.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/webpack/lib/validateSchema.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,179 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { validate } = require("schema-utils");
+
+/* cSpell:disable */
+const DID_YOU_MEAN = {
+	rules: "module.rules",
+	loaders: "module.rules or module.rules.*.use",
+	query: "module.rules.*.options (BREAKING CHANGE since webpack 5)",
+	noParse: "module.noParse",
+	filename: "output.filename or module.rules.*.generator.filename",
+	file: "output.filename",
+	chunkFilename: "output.chunkFilename",
+	chunkfilename: "output.chunkFilename",
+	ecmaVersion:
+		"output.environment (output.ecmaVersion was a temporary configuration option during webpack 5 beta)",
+	ecmaversion:
+		"output.environment (output.ecmaVersion was a temporary configuration option during webpack 5 beta)",
+	ecma: "output.environment (output.ecmaVersion was a temporary configuration option during webpack 5 beta)",
+	path: "output.path",
+	pathinfo: "output.pathinfo",
+	pathInfo: "output.pathinfo",
+	jsonpFunction: "output.chunkLoadingGlobal (BREAKING CHANGE since webpack 5)",
+	chunkCallbackName:
+		"output.chunkLoadingGlobal (BREAKING CHANGE since webpack 5)",
+	jsonpScriptType: "output.scriptType (BREAKING CHANGE since webpack 5)",
+	hotUpdateFunction: "output.hotUpdateGlobal (BREAKING CHANGE since webpack 5)",
+	splitChunks: "optimization.splitChunks",
+	immutablePaths: "snapshot.immutablePaths",
+	managedPaths: "snapshot.managedPaths",
+	maxModules: "stats.modulesSpace (BREAKING CHANGE since webpack 5)",
+	hashedModuleIds:
+		'optimization.moduleIds: "hashed" (BREAKING CHANGE since webpack 5)',
+	namedChunks:
+		'optimization.chunkIds: "named" (BREAKING CHANGE since webpack 5)',
+	namedModules:
+		'optimization.moduleIds: "named" (BREAKING CHANGE since webpack 5)',
+	occurrenceOrder:
+		'optimization.chunkIds: "size" and optimization.moduleIds: "size" (BREAKING CHANGE since webpack 5)',
+	automaticNamePrefix:
+		"optimization.splitChunks.[cacheGroups.*].idHint (BREAKING CHANGE since webpack 5)",
+	noEmitOnErrors:
+		"optimization.emitOnErrors (BREAKING CHANGE since webpack 5: logic is inverted to avoid negative flags)",
+	Buffer:
+		"to use the ProvidePlugin to process the Buffer variable to modules as polyfill\n" +
+		"BREAKING CHANGE: webpack 5 no longer provided Node.js polyfills by default.\n" +
+		"Note: if you are using 'node.Buffer: false', you can just remove that as this is the default behavior now.\n" +
+		"To provide a polyfill to modules use:\n" +
+		'new ProvidePlugin({ Buffer: ["buffer", "Buffer"] }) and npm install buffer.',
+	process:
+		"to use the ProvidePlugin to process the process variable to modules as polyfill\n" +
+		"BREAKING CHANGE: webpack 5 no longer provided Node.js polyfills by default.\n" +
+		"Note: if you are using 'node.process: false', you can just remove that as this is the default behavior now.\n" +
+		"To provide a polyfill to modules use:\n" +
+		'new ProvidePlugin({ process: "process" }) and npm install buffer.'
+};
+
+const REMOVED = {
+	concord:
+		"BREAKING CHANGE: resolve.concord has been removed and is no longer available.",
+	devtoolLineToLine:
+		"BREAKING CHANGE: output.devtoolLineToLine has been removed and is no longer available."
+};
+/* cSpell:enable */
+
+/**
+ * @param {Parameters<typeof validate>[0]} schema a json schema
+ * @param {Parameters<typeof validate>[1]} options the options that should be validated
+ * @param {Parameters<typeof validate>[2]=} validationConfiguration configuration for generating errors
+ * @returns {void}
+ */
+const validateSchema = (schema, options, validationConfiguration) => {
+	validate(
+		schema,
+		options,
+		validationConfiguration || {
+			name: "Webpack",
+			postFormatter: (formattedError, error) => {
+				const children = error.children;
+				if (
+					children &&
+					children.some(
+						child =>
+							child.keyword === "absolutePath" &&
+							child.dataPath === ".output.filename"
+					)
+				) {
+					return `${formattedError}\nPlease use output.path to specify absolute path and output.filename for the file name.`;
+				}
+
+				if (
+					children &&
+					children.some(
+						child =>
+							child.keyword === "pattern" && child.dataPath === ".devtool"
+					)
+				) {
+					return (
+						`${formattedError}\n` +
+						"BREAKING CHANGE since webpack 5: The devtool option is more strict.\n" +
+						"Please strictly follow the order of the keywords in the pattern."
+					);
+				}
+
+				if (error.keyword === "additionalProperties") {
+					const params =
+						/** @type {import("ajv").AdditionalPropertiesParams} */ (
+							error.params
+						);
+					if (
+						Object.prototype.hasOwnProperty.call(
+							DID_YOU_MEAN,
+							params.additionalProperty
+						)
+					) {
+						return `${formattedError}\nDid you mean ${
+							DID_YOU_MEAN[
+								/** @type {keyof DID_YOU_MEAN} */ (params.additionalProperty)
+							]
+						}?`;
+					}
+
+					if (
+						Object.prototype.hasOwnProperty.call(
+							REMOVED,
+							params.additionalProperty
+						)
+					) {
+						return `${formattedError}\n${
+							REMOVED[/** @type {keyof REMOVED} */ (params.additionalProperty)]
+						}?`;
+					}
+
+					if (!error.dataPath) {
+						if (params.additionalProperty === "debug") {
+							return (
+								`${formattedError}\n` +
+								"The 'debug' property was removed in webpack 2.0.0.\n" +
+								"Loaders should be updated to allow passing this option via loader options in module.rules.\n" +
+								"Until loaders are updated one can use the LoaderOptionsPlugin to switch loaders into debug mode:\n" +
+								"plugins: [\n" +
+								"  new webpack.LoaderOptionsPlugin({\n" +
+								"    debug: true\n" +
+								"  })\n" +
+								"]"
+							);
+						}
+
+						if (params.additionalProperty) {
+							return (
+								`${formattedError}\n` +
+								"For typos: please correct them.\n" +
+								"For loader options: webpack >= v2.0.0 no longer allows custom properties in configuration.\n" +
+								"  Loaders should be updated to allow passing options via loader options in module.rules.\n" +
+								"  Until loaders are updated one can use the LoaderOptionsPlugin to pass these options to the loader:\n" +
+								"  plugins: [\n" +
+								"    new webpack.LoaderOptionsPlugin({\n" +
+								"      // test: /\\.xxx$/, // may apply this only for some modules\n" +
+								"      options: {\n" +
+								`        ${params.additionalProperty}: …\n` +
+								"      }\n" +
+								"    })\n" +
+								"  ]"
+							);
+						}
+					}
+				}
+
+				return formattedError;
+			}
+		}
+	);
+};
+module.exports = validateSchema;
