Merge pull request #253 from authzed/use-protovalidate

Swap in protovalidate instead of protoc-gen-validate

Author: tstirrat15

.github/workflows/test.yaml

@@ -16,7 +16,6 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"