Update kopf version

Bump version: 1.3.0 → 1.3.1

Bump version: 1.2.0 → 1.3.0

Bump version: 1.1.0 → 1.2.0

Bump version: 1.1.0-rc3 → 1.1.0

Bump version: 1.1.0-rc2 → 1.1.0-rc3

Bump version: 1.1.0-rc1 → 1.1.0-rc2

Bugfix CRD re-enable validation (#2)

* Rollback CRDs validation
* FIX: apiextensions.k8s.io/v1 does not accept metadata definition

FIX: apiextensions.k8s.io/v1 does not accept metadata definition

HOTFIX: Possible bug in CRDs (openAPIV3Schema) in Kubernetes Upstream