[css/html/json] adopt webpack ignore pattern to windows paths

extensions/css-language-features/server/extension.webpack.config.js

@@ -30,7 +30,7 @@ module.exports = withDefaults({
 	},
 	plugins: [
 		new webpack.NormalModuleReplacementPlugin(
-			/\/vscode-languageserver\/lib\/files\.js/,
+			/\/|\\vscode-languageserver\/|\\lib\/|\\files\.js/,
 			require.resolve('./build/filesFillIn')
 		),
 		new webpack.IgnorePlugin(/vertx/)

extensions/html-language-features/server/extension.webpack.config.js

@@ -34,7 +34,7 @@ module.exports = withDefaults({
 	},
 	plugins: [
 		new webpack.NormalModuleReplacementPlugin(
-			/\/vscode-languageserver\/lib\/files\.js/,
+			/\/|\\vscode-languageserver\/|\\lib\/|\\files\.js/,
 			require.resolve('./build/filesFillIn')
 		),
 		new webpack.IgnorePlugin(/vertx/)

extensions/json-language-features/server/extension.webpack.config.js

@@ -31,7 +31,7 @@ module.exports = withDefaults({
 	plugins: [
 		new webpack.NormalModuleReplacementPlugin(
 			/\/|\\vscode-languageserver\/|\\lib\/|\\files\.js/,
-			require.resolve('./build/files')
+			require.resolve('./build/filesFillIn')
 		),
 		new webpack.IgnorePlugin(/vertx/)
 	],