Cloudscraper

* Removed debug from 2captcha (ooops my bad).
* Added in `no_proxy` to captcha parameters if you dont want to send proxy to 2captcha / anticaptcha.
* Added in platform filtering to `browser` (User-Agent) via `platform` parameter.
* added `doubleDown` parameter to control if re-request is to be performed when Captcha is detected.


* Initial update to Captcha providers to support proxies (anti-captcha, 2captcha).
* Some re-wording, comments and general house cleaning.


~12 days have passed and Cloudflare updated again... they keeping to the schedule 👍


* **Fixed:** Cloudflare V1 challenge change (broke regex by introducing blank `a.value`).
* **Fixed:** string -> float -> string causes issues in py2 str() rounding precision
* **Enhancement:** Added Pre/Posting Hooking into request function.

* Update regex for new Cloudflare changes in numerous places.
* Updated JSFuck challenge for new dynamic k variable.
* Updated interpreters to account for new dynamic k allocation from subset list.


* Update regex for Cloudflare form challenge
* Overwrite auto_set_ecdh by manually setting elliptic curve
* Rewrote native interpreter for JSFuck due to nested calculations
* Added exception if new Cloudflare challenge detected.
* Added support for hCaptcha in 9KW


- Add ability for custom ssl context to be passed
- Added new timer to anticaptcha module
- Fixed Cloudflare's challenge form change
- Removed DNT from headers causing reCaptcha on some sites
- Updated cipher suite for browsers