Dwgdbserver

- Changed: Some monitor commands have been renamed, or the options have changed, which is why the major version number has been bumped.
- Added: The --device command line option now accepts '?' and will, in response, provide the list of supported MCUs.
- Changed: Refactorization of RSP memory read/write.
- The test suite has been set up, and tests for GdbHandler have been developed.
- Fixed: The number generated by the G packet was too large. Now, it is first split into bytes. This bug shows up only when executing the test suite probably means that it has not been used since we introduced the P command.
- Fixed: When calling cmd.startswith(inputstring) one must be aware that if inputstring is empty, the return value is True. In the monitor command parsing, I forgot that.

- Added: Automatic power-cycling for mEDBG (e.g., Atmega328 XPLAINED)

- Refactored: Inserting into flash cache and writing pages have been isolated from vFlashWrite and vFlashDone. Now, they can also be used in the X command.
- Added: X command can now be used when the GDB client does not support XML.

- Added: A new monitor NoXML command for switching off XML capabilities, meaning that we cannot send a memory map and, therefore, cannot make use of the vFlash RSP commands. This command is just there for testing purposes and no "official" monitor command. It will probably go away to some point.

- Fixed: Crash when stopping with ^C because sendPacket instead of sendSignal was used.

- Fixed: pyusb worked perfectly under macOS and Linux for enumerating all USB devices, but I got nothing under Windows. So, I removed this package because hidapi is doing all the work anyway.

- Added: Flash verification
- Added: `monitor flashverify [on|off]`
- Changed: `monitor flashcache [on|off]` to `monitor cache [on|off]`
- Changed requirement for Python to >= 3.9

- First "official" version, published on PyPi