github: update release workflow

Author: radhermit

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
 
     - name: Install dependencies
       run: |
-        # install deps required for building sdist/wheel
+        # install deps required for building sdist/wheels
         python -m pip install --upgrade pip
         pip install -r requirements/dist.txt
         pip install -r requirements/test.txt
@@ -30,14 +30,24 @@ jobs:
         PY_COLORS: 1
       run: python setup.py test
 
-    - name: Build release files
+    - name: Build sdist
       run: |
         git clean -fxd
         python setup.py sdist
-        python setup.py bdist_wheel
-        # output file info
-        tar -ztf dist/*.tar.gz | sort
+
+    - name: Build wheel
+      run: python setup.py bdist_wheel
+
+    - name: Output dist file info
+      run: |
         sha512sum dist/*
+        tar -ztf dist/*.tar.gz | sort
+
+    - name: Install twine and check files
+      run: |
+        pip install twine wheel-inspect
+        twine check dist/*
+        wheel2json dist/*.whl
 
     - name: Upload files for tagged releases
       env:
@@ -46,5 +56,4 @@ jobs:
       # only upload files for tagged releases
       if: startsWith(github.ref, 'refs/tags/')
       run: |
-        pip install twine
         twine upload dist/*