Switch back to node 14

Author: jtpio

.github/workflows/tests.yml

@@ -169,7 +169,7 @@ jobs:
     - name: Set up Node
       uses: actions/setup-node@v2
       with:
-        node-version: 12.x
+        node-version: 14.x
 
     - name: Get yarn cache
       id: yarn-cache