add logging for publish cli

tools/publish-cli.sh

@@ -5,9 +5,13 @@ LAST_TAG=$(git describe $(git rev-list --tags --max-count=1))
 TAG_DIFF=$(git diff $LAST_TAG -- packages/babel-cli/)
 
 if [ -n "$TAG_DIFF" ]; then
+  echo "Changes detected to babel-cli since last tag, publishing new version."
+
   cd ../packages
   node build-cli.js
 
   cd babel-cli
   npm publish
+else
+  echo "No changes detected to babel-cli since last tag"
 fi