VVP 2.1.0 support, multi-version support, many fixes and breaking changes

Changes

• restructured package
• update APIs for VVP 2.1.0

Features

• feat: multi-versioning @austince (#97)
  • adds the v1beta2 api
• feat: support VVP 2.1.0 @austince (#92)
• feat(polling): abstract polling management @austince (#84)

Bug Fixes

• feat: support VVP 2.1.0 @austince (#92)
• fix(chart): allow Event operations in cluster role @austince (#72)
• fix(savepoints): correctly create savepoints and log error msgs @austince (#83)

CI + Process

• ci: add issue templates @austince (#70)
• ci: add release-drafter config @austince (#71)
• ci: add CODEOWNERS @austince (#79)

Dependency Updates

• build(deps): bump sigs.k8s.io/controller-runtime from 0.5.1 to 0.5.2 @dependabot-preview (#102)
• build(deps): bump k8s.io/client-go from 0.17.2 to 0.17.4 @dependabot-preview (#94)
• build(deps): bump github.com/stretchr/testify from 1.4.0 to 1.5.1 @dependabot-preview (#95)
• feat: support VVP 2.1.0 @austince (#92)
• build(deps): bump k8s.io/apimachinery from 0.17.3 to 0.17.4 @dependabot-preview (#90)
• build(deps): bump k8s.io/api from 0.17.2 to 0.17.3 @dependabot-preview (#85)
• build(deps): bump github.com/onsi/ginkgo from 1.11.0 to 1.12.0 @dependabot-preview (#80)
• build(deps): bump github.com/onsi/gomega from 1.8.1 to 1.9.0 @dependabot-preview (#81)
• build(deps): bump k8s.io/api from 0.17.0 to 0.17.2 @dependabot-preview (#76)