build: fix errors in build:lib scripts

Author: BePo65

package.json

@@ -21,8 +21,8 @@
     "test:lib:coverage:ui": "set BROWSERSLIST_IGNORE_OLD_DATA=1 && ng test mat-datatable-lib --code-coverage --watch=false && node tools/open-coverage.mjs",
     "build": "npm run build:lib && npm run build:demo",
     "build:prod": "npm run build:lib:prod && npm run build:demo:prod",
-    "build:lib": "ng build mat-datatable-lib --configuration development && copy-to-dist",
-    "build:lib:prod": "ng build mat-datatable-lib --configuration production && copy-to-dist",
+    "build:lib": "ng build mat-datatable-lib --configuration development && npm run copy-to-dist",
+    "build:lib:prod": "ng build mat-datatable-lib --configuration production && npm run copy-to-dist",
     "build:demo": "ng build mat-datatable-demo --delete-output-path --configuration development",
     "build:demo:prod": "ng build mat-datatable-demo --delete-output-path --configuration production",
     "build:ghpages": "npm run build:prod && del-cli ghpages && cpy \"dist/mat-datatable-demo/**\" ghpages",