Remove external script for types, change module target

tsconfig.json

@@ -4,7 +4,7 @@
         "experimentalDecorators": true,
         "outDir": "./dist",
         "allowJs": true,
-        "module": "es6",
+        "module": "commonjs",
         "target": "es5",
         "moduleResolution": "node",
         "esModuleInterop": true,
@@ -12,6 +12,7 @@
         "incremental": true,
         "sourceMap": true,
         "alwaysStrict": true,
+        "declaration": true,
     },
     "include": [
         "./src/**/*.ts"