Fix | lock signing date

[AlexNDRmac]

Added

• IEventSubscription interface for any operation with Events
• Webhooks 2.0 API partially implemented
• ValidatorId and LockToSignDate properties added to the signNow document model (FieldJsonAttributes)

Changed

• Token type is always set to Bearer or Basic explicitly in every service

Fixed

• LockToSignDate property serialization for Date validator tag

[codecov]

Codecov Report

Merging #157 (7046593) into develop (17a84fb) will decrease coverage by 0.28%.
The diff coverage is n/a.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #157      +/-   ##
===========================================
- Coverage    92.80%   92.53%   -0.28%     
===========================================
  Files           78       78              
  Lines         1474     1474              
===========================================
- Hits          1368     1364       -4     
- Misses         106      110       +4