Release google-apis-core 0.2.1
chore: release google-apis-core 0.2.1 (#2486)
:robot: I have created a release \*beep\* \*boop\*
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### [0.2.1](https://www.github.com/googleapis/google-api-ruby-client/compare/google-apis-core/v0.2.0...v0.2.1) (2021-01-25)
### Bug Fixes
* **core:** Add webrick to the gem dependencies, for Ruby 3 compatibility ([25824f2](https://www.github.com/googleapis/google-api-ruby-client/commit/25824f2512fa96d4d90e220ac038c9b3b2a6a0d1))
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