Use v6.1.3 in CI

Author: eriknw

.github/workflows/test.yml

@@ -14,10 +14,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+        # os: ["ubuntu-latest", "macos-latest", "windows-latest"]  # Waiting on builds
+        os: ["ubuntu-latest"]
         python-version: ["3.7", "3.8", "3.9", "3.10"]
         source: ["conda-forge"]
-        graphblas-version: ["6.0.2"]
+        graphblas-version: ["6.1.3"]
     steps:
     - name: Checkout
       uses: actions/checkout@v2