Bump microbundle from 0.12.4 to 0.13.0

Bumps [microbundle](https://github.com/developit/microbundle) from 0.12.4 to 0.13.0.
- [Release notes](https://github.com/developit/microbundle/releases)
- [Changelog](https://github.com/developit/microbundle/blob/master/CHANGELOG.md)
- [Commits](developit/microbundle@v0.12.4...v0.13.0)

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

package.json

@@ -75,7 +75,7 @@
     "husky": "4.3.8",
     "jest": "25.5.4",
     "lint-staged": "10.5.1",
-    "microbundle": "^0.12.2",
+    "microbundle": "^0.13.0",
     "next": "^10.0.0",
     "npm-run-all": "4.1.5",
     "prettier": "2.1.2",