Update github actions to node 20 (#61)

Author: offtherailz

.github/workflows/checks.yml

@@ -30,7 +30,7 @@ jobs:
       - name: "setting up npm"
         uses: actions/setup-node@v2
         with:
-            node-version: '16.x'
+            node-version: '20.x'
 
       ###############
       # NPM CHECKS