Rt

- Fix UnicodeDecodeError in logging code for non-text attachments (50, 51)
- Documentation: Add a search example (49)
- edit_ticket: Handle possible empty responses: When a ticket is not modified, at least with RT 4.x, an empty
response could be returned. Gracefully handle that as success. (47, 48)

- Drop Python2 support
- Adjust Travis tests for Python3-only, and add v3.8
- Add inline typing
- Remove "debug_mode" parameter
- Add "logging" support (basically replacing "debug_mode" and the various "print"s)
- Fix "no-else-after-return" and "no-else-after-raise"
- Fix "startswitch" typos / bugs
- Removed deprecated "basic_auth" and "digest_auth" parameters. The same functionality is given by specifying the
"http_auth" with an instance of either object. This allows for more flexibility with various other alternative
authentication methods.

- Add deprecation warning for in the next major release unsupported parameters (basic_auth, digest_auth).
They are now replaced with http_auth.
- Fix problematic default method parameters ("{}" and "[]").

- Travis CI Docker tests
- RT 4.4 fixes
- Support multiline CF values in create_ticket and edit_ticket.
- Fix support for custom field names containing colons
- In search(), replace splitlines() with lines array split on \n.
- Add debug_mode flag for response logging
- Add platform independent url joining / Allow testing on Windows
- Add numerical_id to get_ticket result

- Added parameter to set the content type in reply() and comment() (12).
- Added parameter Format to search() (17).
- Tests: Update to new demo instance, fixing tests.
- Tests: Disable tests in Travis, the existing test instance closed the REST interface (28).
- Fix support for custom field names containing colons (37).
- Fix support for custom field values containing newlines (11).

- PEP8 fixes
- update .travis.yml to update python interpreter list and some other small changes
- prefer format over % (PEP 3101)
- Add patch from https://gitlab.labs.nic.cz/labs/python-rt/issues/9
"Support CF search where special chars or spaces in CF names"
- Implement a fix for the issue suggested in
https://gitlab.labs.nic.cz/labs/python-rt/issues/10 (can't create ticket
with multi-line message)
- Implement fix for https://gitlab.labs.nic.cz/labs/python-rt/issues/7
"returned types inconsistent in get_ticket"
Add splitting for Cc and AdminCc