Update GitHub Actions to use latest versions

.github/workflows/test.yml

@@ -15,13 +15,13 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 1
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v6
         with:
-          node-version: 16
+          node-version: 20
           cache: 'npm'
           cache-dependency-path: '**/package-lock.json'
       - run: make deps-project tests-ci

package.json

@@ -58,7 +58,7 @@
     "react-router": "^4.2.0",
     "react-router-dom": "^4.2.2",
     "should": "^13.1.0",
-    "sinon": "next",
+    "sinon": "v19.0.5",
     "uglify-js": "3.1.1",
     "webpack": "^4.46.0",
     "webpack-cli": "^3.3.12",