fix(deps): update dependency croniter to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
croniter	^5.0.0 -> ^6.0.0

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Release Notes

kiorky/croniter (croniter)

v6.0.0

Compare Source

• Announce for now that croniter dev is ended (CRA).
• Rework timestamp_to_datetime to use whatever timezone [kiorky]
• Make datetime_to_timestamp & timestamp_to_datetime public [kiorky]
• Fix EPOCH calculation in case of non UTC & 32 bits based systems [kiorky]
• Apply isort formatter [kiorky]
• Reintegrate test_speed [kiorky]
• Apply black formatter [evanpurkhiser, kiorky]
• Code quality changes [evanpurkhiser, kiorky]
  • Remove unused _get_caller_globals_and_locals [evanpurkhiser]
  • Remove single-use bad_length [evanpurkhiser]
  • Remove unused days in proc_month [evanpurkhiser]
  • Use field_index over i for readability [evanpurkhiser]
  • Always use """ for docstrings [evanpurkhiser]
  • Make helper instance methods that do not use self static [evanpurkhiser]
  • Remove unusd call to sys.exc_info [evanpurkhiser]
  • Remove unused ALPHAS [evanpurkhiser]
  • Improve croniter.expand documentation [evanpurkhiser]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.53%. Comparing base (80f4de1) to head (a628c05).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #411      +/-   ##
==========================================
+ Coverage   74.50%   74.53%   +0.02%     
==========================================
  Files          40       40              
  Lines        3350     3350              
==========================================
+ Hits         2496     2497       +1     
+ Misses        854      853       -1     

see 1 file with indirect coverage changes