Merge pull request grafana#14 from grafana/bump-default-version

Bump default promtail version to v1.2.0

Author: genebean

data/common.yaml

@@ -8,4 +8,5 @@ lookup_options:
 
 promtail::bin_dir: '/usr/local/bin'
 promtail::service_ensure: 'running'
-promtail::version: 'v0.3.0'
+promtail::version: 'v1.2.0'
+