only do travis deploy from master

Signed-off-by: Chris Snow <[email protected]>

Author: snowch

.travis.yml

@@ -38,6 +38,7 @@ jobs:
       script:
         - black --check hpecp/ tests/ bin/
     - stage: deploy
+      if: branch = master
       python: 3.8
       install:
         - pip install tox-travis