Increase node version on release from Node 12 -> 18 (#471)

Author: zglicz

Diff for: .github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 18
       - run: mv .github/workflows/.npmrc .npmrc
       - name: Publish npm package
         env: