Add the change log for v0.6.0 (#23)

Signed-off-by: mprahl <mprahl@users.noreply.github.com>

CHANGELOG/CHANGELOG-v0.6.0.md

@@ -0,0 +1,11 @@
+# v0.6.0
+
+* Updated the operator-sdk from v0.x to v1.x. This is mostly an internal change, however, the
+ controller now uses both `ConfigMap`s and the `Lease` API for leader election by default. If this
+ controller is running on a Kubernetes version without the `Lease` API, use the `--legacy-leader-elect` flag.
+* Fixed a bug that would cause the `relatedObjects` on `ConfigurationPolicy` object statuses to be stale when
+ modifying a policy with an invalid hub policy template.
+* Fixed a bug that would cause objects with byte values to be erroneously updated even though they matched the policy.
+* Improved the API validation on ConfigurationPolicy objects.
+* Updated logging to use zap. The log level is now configurable with CLI flags.
+* Fixed a bug that occurred when object-templates set an invalid annotation type.