install rollup-old as an alias

Author: aminya

package.json

@@ -87,6 +87,7 @@
     "raw-loader": "^4.0.1",
     "rimraf": "^3.0.2",
     "rollup": "^2.26.10",
+    "rollup-old": "npm:rollup@^1",
     "@rollup/plugin-commonjs": "^15.0.0",
     "@rollup/plugin-node-resolve": "^9.0.0",
     "rollup-plugin-commonjs": "^10.1.0",