Update dependency core-js to v2.6.0

Author: renovate-bot

basic/package.json

@@ -25,7 +25,7 @@
     "angular2-moment": "1.9.0",
     "apollo-angular": "0.13.3",
     "apollo-client": "1.9.3",
-    "core-js": "2.5.7",
+    "core-js": "2.6.0",
     "graphql-config-parser": "1.2.1",
     "graphql-tag": "1.3.2",
     "rxjs": "5.5.12",

basic/yarn.lock

@@ -1238,9 +1238,9 @@ copy-webpack-plugin@~4.4.1:
     p-limit "^1.0.0"
     serialize-javascript "^1.4.0"
 
-core-js@2.5.7:
-  version "2.5.7"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.5.7.tgz#f972608ff0cead68b841a16a932d0b183791814e"
+core-js@2.6.0:
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.0.tgz#1e30793e9ee5782b307e37ffa22da0eacddd84d4"
 
 core-js@^2.4.0:
   version "2.4.1"