Add Stylelint support

Also rename CI and split the test target

.github/workflows/test.yml → .github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: Tests
+name: CI
 on: [push, pull_request]
 env:
   CI: true
@@ -29,5 +29,8 @@ jobs:
       - name: Install npm dependencies
         run: npm ci
 
+      - name: Build the files
+        run: npm run build
+
       - name: Run tests
         run: npm test

.stylelintignore

@@ -0,0 +1,3 @@
+**/*.min.css
+**/vendor/
+/_gh_pages/

.stylelintrc

@@ -0,0 +1,18 @@
+{
+  "extends": [
+    "stylelint-config-twbs-bootstrap/scss"
+  ],
+  "rules": {
+    "declaration-no-important": null,
+    "order/properties-order": null,
+    "scss/dollar-variable-default": [
+      true,
+      {
+        "ignore": "local"
+      }
+    ],
+    "selector-max-class": null,
+    "selector-max-type": null,
+    "selector-no-qualifying-type": null
+  }
+}