Extend functionality

[ikhilko]

• added support of "patch" method;
• added clearRoute method that remove registered before route by method and url;
• added unmock method (rollback patches in superagent);
• fixed contexts when called wrapped function.

[A]

@ikhilko Wow! awesome! Please update docs in the readme and I'll merge and publish this pull request :D

[ikhilko]

@shuvalov-anton done!)

[A]

Great! Thank you!

[A]

superagent-mocker@0.3.0 landed on the npm :D