build(deps): bump dotenv from 2.8.1 to 3.0.0

Bumps [dotenv](https://github.com/bkeepers/dotenv) from 2.8.1 to 3.0.0.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/main/Changelog.md)
- [Commits](bkeepers/dotenv@v2.8.1...v3.0.0)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -34,7 +34,7 @@ GEM
     connection_pool (2.4.1)
     curb (1.0.5)
     diff-lcs (1.5.1)
-    dotenv (2.8.1)
+    dotenv (3.0.0)
     drb (2.2.0)
       ruby2_keywords
     dropbox_api (0.1.21)