chore: only run standard-version when tag not exsit

Author: JounQin

.travis.yml

@@ -22,7 +22,7 @@ before_deploy:
   - git remote set-url origin https://user:[email protected]/$TRAVIS_REPO_SLUG.git
   - git fetch origin $TRAVIS_BRANCH:$TRAVIS_BRANCH
   - git checkout $TRAVIS_BRANCH
-  - yarn run standard-version -a --no-verify || echo "nothing changed"
+  - git fetch origin v$(jq -r '.version' package.json) || yarn run standard-version -a --no-verify
 
 deploy:
   provider: script