Update metrics-viewer plugin to version v0.3.0 (#154)

* Updating the metrics-viewer plugin to v0.2.0

* Revert change to README.md

* Revert change to README.md

* Updating the metrics-viewer plugin to v0.2.1

* Update metrics viewer plugin version to v0.3.0

Author: eldada

plugins/metrics-viewer.yml

@@ -1,9 +1,9 @@
 # The metrics-viewer plugin
 pluginName: metrics-viewer
-version: v0.2.1
+version: v0.3.0
 repository: https://github.com/eldada/metrics-viewer
 maintainers:
   - yinonavraham
   - noamshemesh
   - eldada
-tag: v0.2.1
+tag: v0.3.0