Add BLOCKFROST_PROJECT_ID_MAINNET to github action

Author: mathiasfrohlich

.github/workflows/package-test.yml

@@ -22,6 +22,8 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+      env:
+        BLOCKFROST_PROJECT_ID_MAINNET: ${{ secrets.BLOCKFROST_PROJECT_ID_MAINNET }}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip