build (@babel/core) : update @babel-core

7.4.5 => 7.6.4

Author: firestar300

package-lock.json

@@ -21,7 +21,7 @@
   },
   "license": "GPL-2.0",
   "devDependencies": {
-    "@babel/core": "^7.4.5",
+    "@babel/core": "^7.6.4",
     "@babel/preset-env": "^7.4.5",
     "babel-loader": "^8.0.6",
     "browser-sync": "^2.26.7",