Use web test runner instead of karma (#46)

* convert package-lock.json to version 3

* use web-test-runner instead of karma

* actually install web test runner

* set node version to 16

Author: koddsson

.github/workflows/nodejs.yml

@@ -27,10 +27,10 @@ jobs:
           key: ${{ runner.os }}-node-modules-${{ hashFiles('**/package-lock.json') }}
           restore-keys: |
             ${{ runner.os }}-node-modules-
-      - name: Use Node.js 12
-        uses: actions/setup-node@v2
+      - name: Use Node.js 16
+        uses: actions/setup-node@v3
         with:
-          node-version: '12'
+          node-version: '16'
 
       - name: Install dependencies
         run: npm install