Add option to fetch tags even if fetch-depth > 0 (#579)

* Add option to fetch tags even if fetch-depth > 0

* Add jest tests for fetchDepth and fetchTags options

action.yml

@@ -65,6 +65,9 @@ inputs:
   fetch-depth:
     description: 'Number of commits to fetch. 0 indicates all history for all branches and tags.'
     default: 1
+  fetch-tags:
+    description: 'Whether to fetch tags, even if fetch-depth > 0.'
+    default: false
   lfs:
     description: 'Whether to download Git-LFS files'
     default: false