Требует название селекторов в lowercase (#129)

Author: nikolai-shabalin

.stylelintrc

@@ -181,6 +181,8 @@
     "selector-not-notation": "simple",
     "selector-pseudo-element-colon-notation": "double",
 
+    "selector-class-pattern": "^[a-z0-9-_]+$",
+
     "font-family-name-quotes": "always-unless-keyword",
     "function-url-quotes": "always",
     "selector-attribute-quotes": "always",