Added ${2: !v g:snips_author} to snippet 'class'

The php.snippet was changed on line 219 to:
"@author ${2:`!v g:snips_author`}", to insert author name for php classes.

UltiSnips/php.snippets

@@ -216,7 +216,7 @@ endsnippet
 snippet class "Class declaration template" !b
 /**
  * Class ${1:`!p snip.rv=snip.fn.split('.')[0]`}
- * @author $2
+ * @author ${2:`!v g:snips_author`}
  */
 class $1
 {