Knative Operator release v0.18.1

This release consists of the following artifacts:

• operator.yaml: the Knative operator component, which is able to install and delete Knative Serving component, ranging from v0.15.0 to v0.18.1, and Knative Eventing component with in-memory channel, ranging from v0.15.0 to v0.18.3.

The latest Knative Serving v0.18.1 artifacts, bundled within the image of this operator, include serving-crds.yaml, serving-core.yaml, serving-hpa.yaml and serving-post-install-jobs.yaml.

The latest Knative Eventing v0.18.3 artifacts, bundled within the image of this operator, include eventing-crds.yaml, eventing-core.yaml, in-memory-channel.yaml, mt-channel-broker.yaml, eventing-sugar-controller.yaml and eventing-pre-install-jobs.yaml.

The latest network ingress v0.18.0 artifacts, bundled within the image of this operator, include net-istio.yaml.

Bug Fixes

• Docs for publishing the operator in OperatorHub #202 (thanks @aliok)
• Don't wait for Ksvc to scale to zero #299 (thanks @cardil)

Other Changes

• Validate the major.minor as the version matching mechanism for customized manifests #321 (thanks @houshengbo)
• Skip the version checking for network ingress deployment #266 (thanks @houshengbo)
• Bumping k8s to 1.18 #275 (thanks @jcrossley3)
• Add linting config and fix issues #273 (thanks @markusthoemmes)
• Transform jobs first so images are overridable #278 (thanks @markusthoemmes)
• Pin deps to release-0.18 #280 (thanks @ZhiminXiang)