Enabled big sur

Author: s1hofmann

.github/workflows/snapshot.yaml

@@ -49,7 +49,7 @@ jobs:
       - sonar
     strategy:
       matrix:
-        os: [ macos-latest ]
+        os: [ macos-11.0 ]
         node: [ 10, 11, 12, 13, 14 ]
         exclude:
           - os: ubuntu-latest