Fix CI

Author: frodrigo

.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
         run: echo "::set-output name=dir::$(pip cache dir)"
 
       - name: pip cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
           key: ${{ runner.os }}-pip-${{ hashFiles('.gitub/workflows/lint.yml') }}
@@ -69,7 +69,7 @@ jobs:
       run: echo "::set-output name=dir::$(pip cache dir)"
 
     - name: pip cache
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ${{ steps.pip-cache.outputs.dir }}
         key: ${{ runner.os }}-pip-py${{ matrix.python-version }}-${{ hashFiles('**/requirements*.txt') }}