Github workflow for publish to PyPI (#871)

* Github workflow to build and release pytube as a pypi package

* Remove automated github release workflow in favor of semi-automated pypi release workflow.

.github/workflows/pypi-publish.yml

@@ -0,0 +1,32 @@
+# .github/workflows/pypi-publish.yml
+name: Publish to PyPI
+
+on:
+  release:
+    types: [ created ]
+
+jobs:
+  deploy:
+    if: github.actor == 'nficano' || github.actor == 'RONNCC' || github.actor == 'tfdahlin'
+    name: Build Python distribution and publish to PyPI
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Setup python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install build setuptools wheel twine
+
+      - name: Build and publish
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+        run: |
+          python -m build
+          python -m twine upload dist/*

.github/workflows/release.yml

@@ -1,17 +0,0 @@
-# .github/workflows/release.yml
-name: Release
-
-on:
-  pull_request:
-    types: closed
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Tag
-        uses: K-Phoen/semver-release-action@master
-        with:
-          release_branch: master
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}