Upgrade to @babel/compat-data ^7.9.0

package.json

@@ -11,6 +11,7 @@
   "dependencies": {
     "@docusaurus/core": "^2.0.0-alpha.43",
     "@docusaurus/preset-classic": "^2.0.0-alpha.43",
+    "@babel/compat-data": "^7.9.0",
     "classnames": "^2.2.6",
     "react": "^16.8.4",
     "react-dom": "^16.8.4"