Add ? to types

Author: Guillaume Ponçon

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
 npm-debug.log
+.idea

lib/parsers/api_param.js

@@ -21,7 +21,7 @@ var regExp = {
     },
     oType: {                                                // optional type: {string}
         b:               '\\s*(?:\\{\\s*',                  // starting with '{', optional surrounding spaces
-        type:                '([a-zA-Z0-9\(\)#:\\.\\/\\\\\\[\\]_-]+)', // 2
+        type:                '(\\?[a-zA-Z0-9\(\)#:\\.\\/\\\\\\[\\]_-]+)', // 2
         oSize: {                                            // optional size within type: {string{1..4}}
             b:               '\\s*(?:\\{\\s*',              // starting with '{', optional surrounding spaces
             size:                '(.+?)',                   // 3