Use Typescript for config schemas

.github/workflows/tests.yml

@@ -18,10 +18,10 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v4
-      - name: Use Node.js 16
+      - name: Use Node.js 20
         uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 20.x
       - name: Install dependencies
         run: npm install
       - uses: ./

.prettierrc

@@ -0,0 +1,5 @@
+{
+    "singleQuote": true,
+    "printWidth": 140,
+    "tabWidth": 4
+}