add lint and build verification steps

.github/workflows/python-package.yml

@@ -41,3 +41,27 @@ jobs:
         file: /home/runner/coverage.xml
         fail_ci_if_error: true
         verbose: true
+
+  build-verification:
+
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
+      with:
+        python-version: '3.x'
+    - name: Build and check twine
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install build twine
+        python -m build
+        twine check dist/*
+
+  Lint-black:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: psf/black@stable
+      with:
+        # src: "./probables"
+        version: "22.8.0"