Add BLOCKFROST_PROJECT_ID_MAINNET to github action

Author: mathiasfrohlich

.github/workflows/package-test.yml

@@ -22,8 +22,6 @@ 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
@@ -40,5 +38,7 @@ jobs:
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
+      env:
+        BLOCKFROST_PROJECT_ID_MAINNET: ${{ secrets.BLOCKFROST_PROJECT_ID_MAINNET }}
       run: |
         pytest