Version 0.5.30

This version adds pinned dependencies.

Suggested by #151. Thanks!

Version 0.5.29

This version fixes a few small bugs and cleans up the documentation in a few places.

Version 0.5.26

This release fixes a problem where the VTN would not parse a
single pending report correctly.

Version 0.5.25

Release version 0.5.25

This version contains many fixes that were suggested by community
members. Thank you so much for taking the time to find these and
for reporting them.

Fixed:

• Implemented Registration Cancellations
• The VEN will now stop if the VTN did not accept the registration
• The XML messages will now be logged more consistently if debugging is
  enabled
• Fixed a deprecation warning from tzlocal (from apscheduler)
• The VEN will now not re-send its report registrations after it was
  re-registered itself
• VEN: Added duration to metadata reports
• VEN: Removed eiReportID from metadata reports
• VEN: Added dtStart to outgoing reports
• VTN: Update the created_date_time anytime the Event's status changes