Fix github workflow scripts

.github/workflows/build.yml

@@ -40,3 +40,7 @@ jobs:
     - name: Build package
       run:
         python -m build
+
+    - name: Installing
+      run:
+        pip install dist/pysetns-*.tar.gz

.github/workflows/pypi-upload.yml

@@ -19,16 +19,20 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
         python-version: '3.6'
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install build
+
     - name: Build package
-      run: python -m build
+      run: python -m build -s
+
     - name: Publish package
       uses: pypa/gh-action-pypi-publish@release/v1
       with: