release: fix docker image tagging and pypi upload

Author: ivotron

.popper.yml

@@ -39,8 +39,8 @@ steps:
     docker push getpopper/popper:$GIT_SHA_SHORT
 
     if [[ -n $GIT_TAG ]]; then
-      docker tag getpopper/popper getpopper/popper:v$GIT_TAG
-      docker push getpopper/popper:v$GIT_TAG
+      docker tag getpopper/popper getpopper/popper:$GIT_TAG
+      docker push getpopper/popper:$GIT_TAG
     fi
 
 - id: pypi release
@@ -54,5 +54,5 @@ steps:
       pip install twine
       cd src/
       python setup.py sdist
-      twine upload -u "$PYPI_USERNAME" -p "$PYPI_PASSWORD" dist/popper-$GIT_TAG.tar.gz
+      twine upload -u "$PYPI_USERNAME" -p "$PYPI_PASSWORD" dist/*
     fi