Remove spaces in enum names

Enum values can be more than one word, so replace whitespace so that
enum names are valid

Author: enmand

Diff for: src/swagger-2.ts

@@ -31,7 +31,7 @@ function capitalize(str: string) {
 }
 
 function camelCase(name: string) {
-  return name.replace(/(-|_|\.|\s)+[a-z]/g, letter =>
+  return name.replace(/(-|_|\.|\s\W)+[a-z]/g, letter =>
     letter.toUpperCase().replace(/[^0-9a-z]/gi, '')
   );
 }