Add`FailureIssueThreshold` & `RecoveryThreshold` to MonitorConfig

[cleptric]

https://github.com/getsentry/team-sdks/issues/43

https://develop.sentry.dev/sdk/check-ins/

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.07%. Comparing base (bf970d1) to head (3c494c1).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #775   +/-   ##
=======================================
  Coverage   83.07%   83.07%           
=======================================
  Files          49       49           
  Lines        4190     4190           
=======================================
  Hits         3481     3481           
  Misses        567      567           
  Partials      142      142           

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[antonpirker]

Maybe add a test where those parameters are omitted?