Update dependency core-js to v3.21.1

Author: renovate-bot

package.json

@@ -8,7 +8,7 @@
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
-    "core-js": "3.6.5",
+    "core-js": "3.21.1",
     "eslint": "5.16.0",
     "eslint-plugin-vue": "5.2.3",
     "vue": "2.6.11",

yarn.lock

@@ -2401,7 +2401,12 @@ core-js-compat@^3.6.2, core-js-compat@^3.6.4:
     browserslist "^4.8.5"
     semver "7.0.0"
 
-[email protected], core-js@^3.6.4:
+[email protected]:
+  version "3.21.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.21.1.tgz#f2e0ddc1fc43da6f904706e8e955bc19d06a0d94"
+  integrity sha512-FRq5b/VMrWlrmCzwRrpDYNxyHP9BcAZC+xHJaqTgIE5091ZV1NTmyh0sGOg5XqpnHvR0svdy0sv1gWA1zmhxig==
+
+core-js@^3.6.4:
   version "3.6.5"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.6.5.tgz#7395dc273af37fb2e50e9bd3d9fe841285231d1a"
   integrity sha512-vZVEEwZoIsI+vPEuoF9Iqf5H7/M3eeQqWlQnYa8FSKKePuYTf5MWnxb5SDAzCa60b3JBRS5g9b+Dq7b1y/RCrA==