chore(node): use Node.js v20 via .nvmrc file (#9)

Author: caugner

.github/workflows/build-and-test.yml

@@ -24,12 +24,15 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+
       - name: Install Node
         uses: actions/setup-node@v4
         with:
-          node-version: "20.x"
+          node-version-file: ".nvmrc"
+
       - name: Install dependencies
         run: "npm install"
+
       - name: Run tests
         run: npm test
         env:

.nvmrc

@@ -0,0 +1 @@
+v20