chore(deps): update actions/cache action to v2 (#95)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

.github/workflows/publish.yml

@@ -18,7 +18,7 @@ jobs:
           registry-url: 'https://registry.npmjs.org/'
 
       - name: Cache dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.npm
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}