fix: script

Author: NileshPatel17

package.json

@@ -20,8 +20,7 @@
     "test:ci": "jest --runInBand",
     "test:coverage": "jest --coverage",
     "build:prod": "ng build --prod --base-href https://nileshpatel17.github.io/ng-multiselect-dropdown/",
-    "clear:lib": "rimraf dist/lib",
-    "postcopyfiles": "copyfiles -u 1 ./dist/lib/**/*.* node_modules/ng-multiselect-dropdown",
+    "clear:lib": "rimraf dist",
     "copyfiles": "mkdir dist/lib/themes && copyfiles src/themes/ng-multiselect-dropdown.theme.scss dist/lib/themes",
     "build:lib": "yarn run clear:lib && ng-packagr -p ng-package.json",
     "postbuild:lib": "yarn run copyfiles",