chore(*): use core-js-pure

Author: onlyexeption

projects/igniteui-angular/package.json

@@ -68,15 +68,12 @@
     "dependencies": {
         "@types/hammerjs": "^2.0.36",
         "@types/jszip": "^3.1.7",
-        "core-js": "^2.6.11",
+        "core-js-pure": "^3.6.5",
         "hammerjs": "^2.0.8",
         "jszip": "^3.3.0",
         "resize-observer-polyfill": "^1.5.1",
         "igniteui-trial-watermark": "^1.0.3"
     },
-    "devDependencies": {
-        "@types/core-js": "^2.5.3"
-    },
     "peerDependencies": {
         "@angular/common": "^9.0.0",
         "@angular/core": "^9.0.0",