Remove dict39 compatibility

[Nakul-Rajpal]

Fixes #2635

Summary

Removes the Dict39 alias across IntelMQ. Since IntelMQ now requires Python ≥3.9, the alias is no longer necessary.

Details

• Deleted Dict39 = dict from intelmq/lib/datatypes.py
• Replaced Dict39({...}) with standard {...} in:
  • intelmq/lib/bot.py
  • intelmq/tests/lib/test_bot_library_mode.py
• Removed unused Dict39 imports.

[sebix]

The codestyle check fails:

intelmq/lib/bot.py:1530:26: E127 continuation line over-indented for visual indent
intelmq/lib/datatypes.py:140:1: W391 blank line at end of file

While you are at it, could you please add this snippet to the CHANGELOG.md in section Core?

- `intelmq.lib.datatypes`: Remove unneeded Dict39 alias (PR#2639 by Nakul Rajpal, fixes #2635)

[Nakul-Rajpal]

@sebix added said changes.

[sebix]

pycodestyle intelmq/{bots,lib,bin}
intelmq/lib/bot.py:1533:64: W292 no newline at end of file
intelmq/lib/datatypes.py:140:1: W391 blank line at end of file

[Nakul-Rajpal]

@sebix Sorry for the minute changes. Everything should be ready now.