chore(deps): update actions/cache action to v4 (#85)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
         run: |
           echo "::set-output name=dir::$(npm config get cache)"
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ steps.npm-cache.outputs.dir }}
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}