Use node 16

Author: jonrohan

.github/workflows/deploy_production.yml

@@ -42,7 +42,7 @@ jobs:
     secrets:
       gh_token: ${{ secrets.GITHUB_TOKEN }}
     with:
-      node_version: 14
+      node_version: 16
       install: yarn && cd docs && yarn && cd ..
       build: yarn build:docs
       output_dir: docs/public