Support the Kubernetes 1.22 API

Changelog for 0.7.0:

• PR #50 feat: support k8s 1.22 and upgrade dependencies by @LucasRoesler

Commits
dc08c09 chore: rename controller subpackages by @LucasRoesler
fb80496 chore: Readd vendor folder and implement a new flow for codegen by @LucasRoesler
00c34bf Finish test coverage for annotation creation by @LucasRoesler
ed81a7b Remove vendor and fix code generation by @LucasRoesler
b19b539 feat: support k8s 1.22 and upgrade dependencies by @LucasRoesler
6dcc233 Update ISSUE_TEMPLATE.md by @alexellis

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