Merge branch 'release-0.4' of github.com:dapr/dapr into release-0.4

Create release notes for v0.4.0 (dapr#1040)

* Create v0.4.0.md

* Update v0.4.0.md

* Update v0.4.0.md

* Update v0.4.0.md

* Update v0.4.0.md

update components-contrib for Redis (dapr#1037)

fix pipeline bug (dapr#1027)

Create 0.3.0 Release Notes (dapr#872)

Add 0.2.0 release notes (dapr#796)

* Add 0.2.0 release notes

* Update v0.2.0.md

[E2E] Initial commit of e2e test README doc (dapr#792)

* intial commit of test readme

* fix comment request

* Update README.md

Fix docker latest tagging