🔧 Add pnpm as the default corepack package manager

Author: amoutonbrady

package.json

@@ -61,5 +61,6 @@
     "rollup": "^2.62.0",
     "rollup-plugin-cleaner": "^1.0.0",
     "typescript": "^4.5.4"
-  }
+  },
+  "packageManager": "pnpm@6.24.4"
 }