chore(changelog): Add a changelog.adoc (#241)

and added features for 0.2.0

CHANGELOG.adoc

@@ -0,0 +1,165 @@
+# Changelog
+
+// Template:
+////
+[cols="1,10,3", options="header", width="100%"]
+|===
+| | Description | PR
+| 🎁🐛🧽🗑️
+|
+| https://github.com/knative/client/pull/[#]
+|===
+////
+
+## v0.2.0 (2019-07-09)
+
+[cols="1,10,3", options="header", width="100%"]
+|===
+| | Description | PR
+
+| 🎁
+| Add `kn service list <svc-name>` and `kn revision list <rev-name>`
+| https://github.com/knative/client/pull/150[#150]
+
+| 🐛
+| Dynamically set GroupVersionKind via schema lookup
+| https://github.com/knative/client/pull/134[#134]
+
+| 🧽
+| Introduce a `KnClient` interface
+| https://github.com/knative/client/pull/134[#134]
+
+| 🐛
+| Retry update operation on an optimistic lock failure
+| https://github.com/knative/client/pull/[#240]
+
+| 🎁
+| Add `kn route list`
+| https://github.com/knative/client/pull/202[#202]
+
+| 🧽
+| Improved error message when no command is given
+| https://github.com/knative/client/pull/218[#218]
+
+| 🎁
+| Add gotest.tools testing support
+| https://github.com/knative/client/pull/218[#218]
+
+| 🎁
+| Add second test run against latest released Knative serving version
+| https://github.com/knative/client/pull/170[#170]
+
+| 🎁️
+| Add `--port` to `kn service create` and `kn service update`
+| https://github.com/knative/client/pull/191[#191]
+
+| 🎁
+| Add `kn revision delete`
+| https://github.com/knative/client/pull/207[#207]
+
+| 🎁
+| Add goimport to `build.sh`
+| https://github.com/knative/client/pull/186[#186]
+
+| 🧽
+| Wait for service to become ready with `kn service create`
+| https://github.com/knative/client/pull/156[#156]
+
+| 🎁
+| Add shell based smoke tests
+| https://github.com/knative/client/pull/183[#183]
+
+| 🧽
+| Use current namespace from `.kube/config` as default
+| https://github.com/knative/client/pull/172[#172]
+
+| 🧽
+| Add `--force` to `kn service create` for replacing existing service
+| https://github.com/knative/client/pull/79[#79]
+
+| 🧽
+| Add `kn revision list --service <srv>`
+| https://github.com/knative/client/pull/194[#194]
+
+| 🧽
+| Add success message to `kn service update`
+| https://github.com/knative/client/pull/169[#169]
+
+| 🎁
+| Add mandatory license check to `build.sh`
+| https://github.com/knative/client/pull/187[#187]
+
+| 🎁
+| Add Golang based E2E tests
+| https://github.com/knative/client/pull/121[#121]
+
+| 🧽
+| Rename `kn revision get` to `kn revision list`
+| https://github.com/knative/client/pull/180[#180]
+
+| 🧽
+| Rename `kn service get` to `kn service list`
+| https://github.com/knative/client/pull/179[#179]
+
+| 🧽
+| Refactoring to use sub-packages
+| https://github.com/knative/client/pull/66[#66]
+
+| 🎁
+| Add `--test`, `--fast`, `--update` to `build.sh`
+| https://github.com/knative/client/pull/149[#149]
+
+| 🧽️
+| Update to Knative serving 0.6.0
+| https://github.com/knative/client/pull/129[#129]
+
+| 🎁
+| Add Zsh completion
+| https://github.com/knative/client/pull/132[#132]
+
+
+| 🎁
+| Add autoscale & concurrency options for `service create` and `service update` (`--min-scale`, `--max-scale`, `--concurrency-limit`, `--concurrency-target`)
+| https://github.com/knative/client/pull/157[#157]
+
+| 🎁
+| Add `--watch` for `build.sh` to enter a compile-watch loop
+| https://github.com/knative/client/pull/160[#160]
+
+|===
+
+## v0.1.0 (2019-05-17)
+
+[cols="1,10,3", options="header", width="100%"]
+|===
+| | Description | PR
+
+| 🎁
+| Add --force for `service create`
+| https://github.com/knative/client/pull/79[#79]
+
+| 🐛
+| Fix info messages after `service create`  and `service delete`
+| https://github.com/knative/client/pull/95[#95]
+
+| 🎁
+| Add `revision get`
+| https://github.com/knative/client/pull/97[#97]
+
+| 🎁
+| Add `service get`
+| https://github.com/knative/client/pull/90[#90]
+
+|===
+
+'''
+_Legend_ :  🎁 Feature - 🐛 Fix - 🧽 Update - 🗑️ Remove
+
+////
+---------------------------------------------
+Ignore PRs:
+
+12
+45
+---------------------------------------------
+////