chore(deps-dev): bump @babel/plugin-proposal-optional-chaining

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

@@ -36,7 +36,7 @@
     "@babel/cli": "7.12.17",
     "@babel/core": "7.12.17",
     "@babel/plugin-proposal-nullish-coalescing-operator": "7.13.8",
-    "@babel/plugin-proposal-optional-chaining": "7.12.17",
+    "@babel/plugin-proposal-optional-chaining": "7.13.8",
     "@babel/preset-env": "7.12.17",
     "@babel/preset-flow": "7.12.13",
     "@rollup/plugin-commonjs": "17.1.0",