deps(dev): bump aegir from 37.12.1 to 39.0.8

Bumps [aegir](https://github.com/ipfs/aegir) from 37.12.1 to 39.0.8.
- [Release notes](https://github.com/ipfs/aegir/releases)
- [Changelog](https://github.com/ipfs/aegir/blob/master/CHANGELOG.md)
- [Commits](ipfs/aegir@v37.12.1...v39.0.8)

---
updated-dependencies:
- dependency-name: aegir
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -166,7 +166,7 @@
   },
   "devDependencies": {
     "@ipld/garbage": "^6.0.0",
-    "aegir": "^37.5.6",
+    "aegir": "^39.0.8",
     "buffer": "^6.0.3"
   }
 }