Update RegExUtil.java

Updating theme regex to support dashes.

Author: LouisdeLooze

src/com/magento/idea/magento2plugin/util/RegExUtil.java

@@ -64,7 +64,7 @@ public static class Magento {
                 = "[A-Z][a-zA-Z0-9]+_[A-Z][a-zA-Z0-9]+";
 
         public static final String THEME_NAME
-                = "[a-z]+/[A-Z][a-zA-Z0-9_]+/[a-z][a-zA-Z0-9_]+";
+                = "[a-z]+/[a-zA-Z0-9_-]+/[a-zA-Z0-9_-]+";
 
         public static final String MFTF_CURLY_BRACES
                 = ".*\\{\\{[^\\}]+\\}\\}.*";