Remove aliases for attributes

[Eugene Zhlobo]

For now we have very few aliases for attributes:

babel-plugin-transform-react-pug/src/visitors/Tag.js

Lines 50 to 60 in 429ca31

 switch (name) { 
   case 'for': 
     name = 'htmlFor'; 
     break; 
   case 'maxlength': 
     name = 'maxLength'; 
     break; 
   case 'class': 
     name = 'className'; 
     break; 
 } 

I think we should get rid of it to get the same experience as with jsx and react. Unless you know good reason to do that, this way we will make more aliases to be compatible more with plain html.

[Eugene Zhlobo]

Done in v7.0.0