Bump @babel/preset-env from 7.12.13 to 7.13.8

Bumps [@babel/preset-env](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env) from 7.12.13 to 7.13.8.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.8/packages/babel-preset-env)

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

package.json

@@ -11,7 +11,7 @@
     "@babel/plugin-proposal-class-properties": "^7.12.13",
     "@babel/plugin-proposal-private-methods": "^7.12.13",
     "@babel/plugin-transform-modules-umd": "^7.12.13",
-    "@babel/preset-env": "^7.12.13",
+    "@babel/preset-env": "^7.13.8",
     "@uupaa/dynamic-import-polyfill": "^1.0.2",
     "autoprefixer": "^9.8.6",
     "babel-loader": "^8.2.2",