add types for ts support and support webpack v5 config

.prettierignore

@@ -4,4 +4,5 @@
 /test/fixtures
 /test/cases/*/expected
 /test/js
+*.d.ts
 CHANGELOG.md

package.json

@@ -37,7 +37,8 @@
     "defaults": "webpack-defaults"
   },
   "files": [
-    "dist"
+    "dist",
+    "types.d.ts"
   ],
   "peerDependencies": {
     "webpack": "^4.4.0 || ^5.0.0"

types.d.ts

@@ -0,0 +1,45 @@
+import { compilation, Compiler, Plugin } from "webpack";
+
+/**
+ * Lightweight CSS extraction webpack plugin
+ * This plugin extract CSS into separate files. It creates a CSS file per JS file which contains CSS. It supports On-Demand-Loading of CSS and SourceMaps.
+ * Configuration Detail: https://github.com/webpack-contrib/mini-css-extract-plugin#configuration
+ */
+declare class MiniCssExtractPlugin extends Plugin {
+    /** webpack loader used always at the end of loaders list */
+    static loader: string;
+
+    constructor(options?: MiniCssExtractPlugin.PluginOptions);
+    apply(compiler: Compiler): void;
+}
+
+declare namespace MiniCssExtractPlugin {
+    interface PluginOptions {
+        /**
+         * Options similar to the same options in webpackOptions.output, both options are optional
+         * May contain `[name]`, `[id]`, `hash` and `[chunkhash]`
+         */
+        filename?: string;
+        chunkFilename?: string;
+        /**
+         * For projects where CSS ordering has been mitigated through consistent
+         * use of scoping or naming conventions, the CSS order warnings can be
+         * disabled by setting this flag to true for the plugin.
+         */
+        ignoreOrder?: boolean;
+        /**
+         * By default, mini-css-extract-plugin generates JS modules that use the CommonJS
+         * modules syntax. There are some cases in which using ES modules is beneficial,
+         * like in the case of module concatenation and tree shaking.
+         */
+        esModule?: boolean;
+        /**
+         * With the `moduleFilename` option you can use chunk data to customize the filename.
+         * This is particularly useful when dealing with multiple entry points
+         * and wanting to get more control out of the filename for a given entry point/chunk
+         */
+        moduleFilename?: (chunk: compilation.Chunk) => string;
+    }
+}
+
+export = MiniCssExtractPlugin;