Update version to 18.x

Author: jamtur01

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Use Node.js
       uses: actions/setup-node@v1
       with:
-        node-version: '14.x'
+        node-version: '18.x'
     - name: Run Yarn
       run: yarn
     - name: Run tests