Updating build templates

Author: gavin-aguiar

eng/templates/build.yml

@@ -15,7 +15,10 @@ jobs:
           python --version
         displayName: 'Check python version'
       - bash: |
+          python -m venv .env
+          .env\Scripts\Activate.ps1
           python -m pip install -U pip
-          pip install twine wheel
+          python -m pip install .
+          python -m pip install twine wheel
           python setup.py sdist bdist_wheel
         displayName: 'Build Python SDK'