Bump http-cache-semantics and semantic-release

Removes [http-cache-semantics](https://github.com/kornelski/http-cache-semantics). It's no longer used after updating ancestor dependency [semantic-release](https://github.com/semantic-release/semantic-release). These dependencies need to be updated together.


Removes `http-cache-semantics`

Updates `semantic-release` from 15.14.0 to 20.1.0
- [Release notes](https://github.com/semantic-release/semantic-release/releases)
- [Commits](semantic-release/semantic-release@v15.14.0...v20.1.0)

---
updated-dependencies:
- dependency-name: http-cache-semantics
  dependency-type: indirect
- dependency-name: semantic-release
  dependency-type: direct:development
...

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