Update @babel/preset-env requirement in /blank_rust_react_project

Updates the requirements on [@babel/preset-env](https://github.com/babel/babel) to permit the latest version.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v7.8.6...v7.9.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

blank_rust_react_project/package.json

@@ -15,7 +15,7 @@
     "test": "cd contract && cargo test --package status-message -- --nocapture"
   },
   "devDependencies": {
-    "@babel/preset-env": "^7.8.6",
+    "@babel/preset-env": "^7.9.0",
     "@babel/preset-react": "^7.8.3",
     "babel-jest": "^25.1.0",
     "gh-pages": "^2.2.0",