Add stylelint and enforce via global package.json (#106)

.stylelintignore

@@ -0,0 +1,5 @@
+build/
+dist/
+www/
+loader/
+node_modules/

.stylelintrc

@@ -0,0 +1,13 @@
+{
+  "extends": "stylelint-config-standard",
+  "rules": {
+    "no-empty-source": null,
+    "selector-class-pattern": "^([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
+    "selector-type-no-unknown": [
+      true,
+      {
+        "ignore": ["custom-elements"]
+      }
+    ]
+  }
+}

package.json

@@ -14,10 +14,12 @@
     "start": "cd packages/components && yarn run start",
     "build": "lerna run build --stream",
     "clean": "git clean -dxf -e /.idea -e /.vscode -e creds.json",
-    "fix": "npm-run-all -p fix:eslint",
+    "fix": "npm-run-all -p fix:eslint fix:stylelint",
     "fix:eslint": "eslint --fix --ext .js,.ts,.tsx .",
-    "test": "npm-run-all -p test:unit test:eslint test:git",
+    "fix:stylelint": "stylelint '**/*.css' --fix",
+    "test": "npm-run-all -p test:unit test:eslint test:stylelint test:git",
     "test:eslint": "eslint --ext .js,.ts,.tsx . --max-warnings=49",
+    "test:stylelint": "stylelint '**/*.css' --max-warnings 0",
     "test:unit": "lerna run test --stream --concurrency 1",
     "test:git": "git diff --exit-code",
     "pack": "lerna run pack",
@@ -74,8 +76,8 @@
     "lerna-changelog": "^1.0.1",
     "npm-run-all": "^4.1.5",
     "query-string": "^6.13.5",
-    "stylelint": "^11.1.1",
-    "stylelint-config-standard": "^19.0.0",
+    "stylelint": "14.8.2",
+    "stylelint-config-standard": "25.0.0",
     "ts-jest": "26.5.6",
     "ts-loader": "9.2.6",
     "webpack": "^4.41.2",