build: add new packages and script option

Author: angelux

package.json

@@ -11,13 +11,16 @@
     "@babel/plugin-transform-object-assign": "^7.12.13",
     "@babel/preset-env": "^7.12.17",
     "@rollup/plugin-babel": "^5.3.0",
+    "@rollup/plugin-typescript": "^12.3.0",
     "ava": "^3.15.0",
     "jsdom": "15",
     "rollup": "^2.39.0",
     "rollup-plugin-modify": "^3.0.0",
     "rollup-plugin-scss": "^3.0.0",
     "rollup-plugin-terser": "^7.0.2",
-    "sass": "^1.42.1"
+    "sass": "^1.42.1",
+    "tslib": "^2.8.1",
+    "typescript": "^5.9.3"
   },
   "homepage": "https://vb.github.io/lazyframe",
   "jsnext:main": "src/lazyframe.js",
@@ -42,7 +45,8 @@
     "build": "rollup -c",
     "dev": "rollup -c -w",
     "test": "npm run build && ava -s",
-    "test:watch": "npm run build && ava -s -w"
+    "test:watch": "npm run build && ava -s -w",
+    "typecheck": "tsc --noEmit"
   },
   "files": [
     "dist",