Bump Custom Metrics - Stackdriver Adapter version to v0.2.0
Bump Custom Metrics - Stackdriver Adapter version to v0.2.0

kawych/k8s-stackdriver,kawych/k8s-stackdriver,GoogleCloudPlatform/k8s-stackdriver,kawych/k8s-stackdriver,GoogleCloudPlatform/k8s-stackdriver,kawych/k8s-stackdriver,GoogleCloudPlatform/k8s-stackdriver