Bump got, ava and del-cli

Removes [got](https://github.com/sindresorhus/got). It's no longer used after updating ancestor dependencies [got](https://github.com/sindresorhus/got), [ava](https://github.com/avajs/ava) and [del-cli](https://github.com/sindresorhus/del-cli). These dependencies need to be updated together.


Removes `got`

Updates `ava` from 0.18.2 to 6.1.3
- [Release notes](https://github.com/avajs/ava/releases)
- [Commits](avajs/ava@v0.18.2...v6.1.3)

Updates `del-cli` from 0.2.1 to 5.1.0
- [Release notes](https://github.com/sindresorhus/del-cli/releases)
- [Commits](sindresorhus/del-cli@v0.2.1...v5.1.0)

---
updated-dependencies:
- dependency-name: got
  dependency-type: indirect
- dependency-name: ava
  dependency-type: direct:development
- dependency-name: del-cli
  dependency-type: direct:development
...

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

Author: dependabot[bot]