Fixed build failure on CI when rebuilding a tag

Author: dimkr

.travis.yml

@@ -32,7 +32,7 @@ script:
 before_deploy:
   - git config --local user.name "Dima Krasner"
   - git config --local user.email "[email protected]"
-  - git tag "$TRAVIS_BRANCH-$(git log --format=%h -1)"
+  - git tag -f "$TRAVIS_BRANCH-$(git log --format=%h -1)"
 
 deploy:
   provider: releases