fix(doc): fix copy files

Author: nivekcode

package-lock.json

@@ -4,7 +4,7 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve",
-    "copy:readme": "ncp README.md ./projects/ng-sortgrid",
+    "copy:readme": "copyfiles ./README.md ./projects/ng-sortgrid",
     "format:check": "prettier --list-different 'projects/**/*.ts'",
     "format:write": "prettier --write 'projects/**/*.ts'",
     "test": "ng test",
@@ -32,7 +32,6 @@
     "@angular/platform-browser-dynamic": "~7.2.0",
     "@angular/router": "~7.2.0",
     "core-js": "^2.5.4",
-    "ncp": "^2.0.0",
     "rxjs": "~6.3.3",
     "tslib": "^1.9.0",
     "zone.js": "~0.8.26"
@@ -51,6 +50,7 @@
     "@types/node": "~8.9.4",
     "codecov": "^3.3.0",
     "codelyzer": "~4.5.0",
+    "copyfiles": "^2.1.0",
     "husky": "^1.3.1",
     "jasmine-core": "~2.99.1",
     "jasmine-spec-reporter": "~4.2.1",