Add Verification for Headless

[daneski13]

I ran into some issues where it wasn't logging into my account since Yahoo asked for a verification code from my recovery email or phone number rather than a CAPTCHA.

With this addition, yahooquery will prompt the user for the verification code sent to the phone/email and input it accordingly to complete sign-in.

I also set the page loading strategy to eager since we only don't need to wait for any CSS or JS downloading in the background, it speeds up the process a bit.

[codecov]

Codecov Report

Attention: Patch coverage is 8.33333% with 11 lines in your changes missing coverage. Please review.

Project coverage is 92.89%. Comparing base (399284b) to head (4333121).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
yahooquery/headless.py	8.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #265      +/-   ##
==========================================
- Coverage   93.81%   92.89%   -0.93%     
==========================================
  Files          15       15              
  Lines        1359     1380      +21     
==========================================
+ Hits         1275     1282       +7     
- Misses         84       98      +14     

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