Update dependency @babel/core to v7.15.5

Author: renovate-bot

package-lock.json

@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/bahmutov/code-coverage-webpack-dev-server#readme",
   "devDependencies": {
-    "@babel/core": "7.15.4",
+    "@babel/core": "7.15.5",
     "@babel/preset-env": "7.15.4",
     "@babel/register": "7.15.3",
     "@cypress/code-coverage": "1.14.0",