fix(task): fix #832, fix #835, task.data should be an object

[JiaLiPassion]

fix #832.
fix #835.

• Task.data should not be a string but an object.
• should define _global.

[corvinrok]

since you are already creating TRUE_STR and FALSE_STR on line 10 and line 11, why not reuse those consts here by generating the regex with something like
let evt_name_sym_regx = new RegExp('^__zone_symbol__(\\w+)(' +TRUE_STR + '|' + FALSE_STR + ')\$');

[JiaLiPassion]

@kgentes , yes, you are right, I just checked again, because this regx is just initialized once, so I think it is ok to not reuse TRUE_STR and FALSE_STR. It will be more readable.

[corvinrok]

agreed.

[corvinrok]

I am still learning this code, so I don't feel confident enough to give an official approval. However, I did review this change across the three files submitted, and do agree with the changes related to fix #834

[JiaLiPassion]

@kgentes , thank you for review, the code is a little difficult to understand than the earlier version because of the performance concern.

[mhevery]

can we get global from __load_patch? I would prefer to have the global logic centralized.

[JiaLiPassion]

@mhevery , I have changed the structure and let patchEventTargetMethods to use the _global from __load_patch, and travis CI has passed, please review.