[array.unique]: add core-js library

package-lock.json

@@ -794,7 +794,7 @@
       "dev": true,
       "requires": {
         "babel-runtime": "6.26.0",
-        "core-js": "2.5.0",
+        "core-js": "2.5.1",
         "regenerator-runtime": "0.10.5"
       },
       "dependencies": {
@@ -877,7 +877,7 @@
       "requires": {
         "babel-core": "6.26.0",
         "babel-runtime": "6.26.0",
-        "core-js": "2.5.0",
+        "core-js": "2.5.1",
         "home-or-tmp": "2.0.0",
         "lodash": "4.17.4",
         "mkdirp": "0.5.1",
@@ -890,7 +890,7 @@
       "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
       "dev": true,
       "requires": {
-        "core-js": "2.5.0",
+        "core-js": "2.5.1",
         "regenerator-runtime": "0.11.0"
       }
     },
@@ -1217,10 +1217,9 @@
       "dev": true
     },
     "core-js": {
-      "version": "2.5.0",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.5.0.tgz",
-      "integrity": "sha1-VpwFCRi+ZIazg3VSAorgRmtxcIY=",
-      "dev": true
+      "version": "2.5.1",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.5.1.tgz",
+      "integrity": "sha1-rmh03GaTd4m4B1T/VCjfZoGcpQs="
     },
     "core-util-is": {
       "version": "1.0.2",

package.json

@@ -39,5 +39,8 @@
       "env",
       "stage-2"
     ]
+  },
+  "dependencies": {
+    "core-js": "^2.5.1"
   }
 }