feat: add typescript declaration file (#38)

index.d.ts

@@ -0,0 +1,26 @@
+import { Plugin } from 'rollup';
+import { MinifyOptions } from 'terser';
+
+export interface Options extends MinifyOptions {
+
+	/**
+	 * Specifically include/exclude chunk files names (minimatch pattern, or array of minimatch patterns), By default all chunk files will be minify.
+	 */
+	include?: Array<string | RegExp> | string | RegExp | null;
+	exclude?: Array<string | RegExp> | string | RegExp | null;
+
+	/**
+	 * Amount of workers to spawn. Defaults to the number of CPUs minus 1.
+	 */
+	numWorkers?: number;
+
+	/**
+	 * Generates source maps and passes them to rollup.
+	 *
+	 * @default true
+	 */
+	sourcemap?: boolean;
+
+}
+
+export declare function terser(options?: Options): Plugin;

package.json

@@ -3,8 +3,10 @@
   "version": "5.0.0",
   "description": "Rollup plugin to minify generated es bundle",
   "main": "index.js",
+  "types": "index.d.ts",
   "files": [
     "index.js",
+    "index.d.ts",
     "transform.js"
   ],
   "scripts": {