------------------
Added
- Add new tasks:
- ``AntiGateTask`` and ``AntiGateTaskProxyless``
- ``RecaptchaV2EnterpriseTask`` and ``RecaptchaV2EnterpriseTaskProxyless``
- ``GeeTestTask`` and ``GeeTestTaskProxyless``
- ``RecaptchaV2Task`` (alias of ``NoCaptchaTask``) and ``RecaptchaV2TaskProxyless`` (alias of ``NoCaptchaTaskProxyless``)
- Add example for ``AntiGateTaskProxyless``
- Add optional parameters ``comment``, ``websiteUrl`` to ``ImageToTextTask``
- Add optional parameter ``funcaptchaApiJSSubdomain``, ``data`` to ``FunCaptchaTask*``
- Add optional parameter ``isEnterprise`` to ``RecaptchaV3Task*``
Removed
- Drop tasks unsupported upstream: ``CustomCaptchaTask``, ``SquareNetTask``
Changed
- Internal refactor to extract ``UserAgentMixin``, ``CookieMixin``
- Use nose2 for tests