detect error and error_description in redirect uri

[aarongranick-okta]

• isLoginRedirect will now return true when there is an error and error_description in the redirect uri
• adds test for OAuthError from parseFromUrl which encapsulates this error from the backend

[codecov-io]

Codecov Report

Merging #583 (ff58d51) into master (3fdc52e) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #583      +/-   ##
==========================================
+ Coverage   92.96%   92.98%   +0.01%     
==========================================
  Files          38       38              
  Lines        2161     2167       +6     
  Branches      452      454       +2     
==========================================
+ Hits         2009     2015       +6     
  Misses        152      152              

Impacted Files	Coverage Δ
lib/oauthUtil.ts	98.54% <100.00%> (+0.06%)	⬆️

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[aarongranick-okta]

@shuowu see CHANGELOG. I am targeting the change for next minor version release. Although it can definitely be considered a bug fix, there is also the possibility that any change in the result from isLoginRedirect may change app behavior in large ways. So I think it's safer to put on minor version.