Fix tag syntax in workflow yaml

Signed-off-by: Dan Ryan <dan.ryan@canonical.com>

.github/workflows/pypi_upload.yml

@@ -1,13 +1,13 @@
-name: Create Release & Upload To PyPI
+name: Upload Python Package
 
 on:
   push:
     # Sequence of patterns matched against refs/tags
     tags:
-      - v?[0-9]+.[0-9]+.[0-9]+.?(a|b|rc|dev)?[0-9]+  # add .* to allow dev releases
+      - v[0-9]+.[0-9]+.*  # add .* to allow dev releases
 
 jobs:
-  build:
+  deploy:
     name: pipenv PyPI Upload
     runs-on: ubuntu-latest
     env:
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2
 
     - uses: webfactory/ssh-agent@v0.1.1
       with:
@@ -37,14 +37,18 @@ jobs:
       with:
         python-version: 3.7
 
-    - name: Install latest tools for build
+    - name: Install dependencies
       run: |
-        python -m pip install --upgrade --upgrade-strategy=eager pip setuptools wheel invoke
+        python -m pip install --upgrade --upgrade-strategy=eager pip setuptools wheel twine
         python -m pip install .
         python -m pipenv install --dev
+      env:
+        PIPENV_PYTHON: "3.7"
+
     - name: Build wheels
       run: |
-        python -m pipenv runpython setup.py sdist bdist_wheel
+        python -m pipenv run python setup.py sdist bdist_wheel
+
     # to upload to test pypi, pass repository_url: https://test.pypi.org/legacy/ and use secrets.TEST_PYPI_TOKEN
     - name: Publish a Python distribution to PyPI
       uses: pypa/gh-action-pypi-publish@master
@@ -53,6 +57,7 @@ jobs:
         password: ${{ secrets.TEST_PYPI_TOKEN }}
         repository_url: https://test.pypi.org/legacy/
         packages_dir: dist/
+
     # git push https://${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git HEAD:master
     # we need to use a deploy key for this to get around branch protection as the default token fails
     - name: Pre-bump
@@ -61,3 +66,4 @@ jobs:
         git config --local user.email action@github.com
         python -m pipenv run inv release.bump-version --dev --commit
         git push git@github.com:${{ github.repository }}.git HEAD:master
+