ci(github workflows): moved deploy job in ci.yml

Deploy job is now only executed when a tag is pushed

.github/workflows/ci.yml

@@ -1,13 +1,15 @@
 # This workflow will install Python dependencies, run tests and lint with a variety of Python versions
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
-name: CI
+name: CI/CD
 
-on: [pull_request, push, workflow_dispatch]
+on:
+  push:
+  pull_request:
+    branches: [ dev ]
 
 jobs:
-  build:
-
+  test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -35,3 +37,28 @@ jobs:
         pytest
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v1
+
+  deploy:
+    needs: test
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+    environment: Production
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install setuptools wheel twine
+    - name: Build and publish
+      env:
+        TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+        TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+      run: |
+        python setup.py sdist bdist_wheel
+        twine upload dist/*