Bump @babel/plugin-proposal-optional-chaining from 7.12.17 to 7.13.8

Bumps [@babel/plugin-proposal-optional-chaining](https://github.com/babel/babel/tree/HEAD/packages/babel-plugin-proposal-optional-chaining) from 7.12.17 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-plugin-proposal-optional-chaining)

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

package.json

@@ -68,7 +68,7 @@
     "@babel/plugin-proposal-export-default-from": "7.12.13",
     "@babel/plugin-proposal-export-namespace-from": "7.12.13",
     "@babel/plugin-proposal-nullish-coalescing-operator": "7.12.13",
-    "@babel/plugin-proposal-optional-chaining": "7.12.17",
+    "@babel/plugin-proposal-optional-chaining": "7.13.8",
     "@babel/plugin-syntax-dynamic-import": "7.8.3",
     "@babel/plugin-transform-runtime": "7.12.17",
     "@babel/preset-env": "7.12.17",