Don't run tests against scala 2.11 or scala 2.12

Definitely don't merge this into the upstream repo!

Author: srollins-lucid

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         java: [8, 11, 17]
-        scala: [2.11.12, 2.12.15, 2.13.8, 3.0.2]
+        scala: [2.13.8, 3.0.2]
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2