refactor: Replace linting configurations

The previous package was outdated, preventing us from updating TS.
This one also lints YAML and JSON,
and applies many more rules to the test files,
explaining all the changes in this PR.

.github/workflows/npm-test.yml

@@ -10,12 +10,12 @@ jobs:
       - uses: actions/checkout@v4.1.1
       - uses: actions/setup-node@v4
         with:
-          node-version: '16.x'
+          node-version: 16.x
       - run: npm ci --ignore-scripts
       - run: npm run lint
 
   test-unit:
-  # Run unit tests on windows and linux
+    # Run unit tests on windows and linux
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
@@ -24,9 +24,9 @@ jobs:
           - windows-latest
         node-version:
           - '18.0'
-          - '18.x'
+          - 18.x
           - '20.0'
-          - '20.x'
+          - 20.x
     timeout-minutes: 15
     steps:
       - name: Use Node.js ${{ matrix.node-version }}
@@ -51,13 +51,13 @@ jobs:
           parallel: true
 
   test-integration:
-  # Run integration tests on linux (full suite, with external dependencies)
+    # Run integration tests on linux (full suite, with external dependencies)
     runs-on: ubuntu-latest
     strategy:
       matrix:
         node-version:
-          - '18.x'
-          - '20.x'
+          - 18.x
+          - 20.x
     env:
       TEST_DOCKER: true
     services:
@@ -85,13 +85,13 @@ jobs:
         run: npm run test:integration
 
   test-integration-windows:
-  # Run integration tests on windows (no external dependencies)
+    # Run integration tests on windows (no external dependencies)
     runs-on: windows-latest
     strategy:
       matrix:
         node-version:
-          - '18.x'
-          - '20.x'
+          - 18.x
+          - 20.x
     timeout-minutes: 20
     steps:
       - name: Use Node.js ${{ matrix.node-version }}
@@ -108,7 +108,7 @@ jobs:
         run: npm run test:integration
 
   test-configs:
-  # Test startup of CSS with all configs inside the config/ folder
+    # Test startup of CSS with all configs inside the config/ folder
     runs-on: ubuntu-latest
     services:
       sparql-endpoint:
@@ -121,7 +121,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '16.x'
+          node-version: 16.x
       - name: Check out repository
         uses: actions/checkout@v4.1.1
       - name: Install dependencies and run build scripts
@@ -130,7 +130,7 @@ jobs:
         run: npm run test:deploy
 
   coveralls:
-  # Consolidate test coverage reports from all unit tests
+    # Consolidate test coverage reports from all unit tests
     needs: test-unit
     runs-on: ubuntu-latest
     steps: