GitHub actions/cache@v2 -> actions/cache@v4

- Deprecation notice: actions/toolkit#1890

Author: danieroux

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           tools-deps: '1.10.3.1040'
       - name: Cache All The Things
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.m2/repository