Sqlite-rx

Upgraded dependencies to fix security issues

- msgpack==1.1.0
- pyzmq==26.2.0
- tornado==6.4.2
- billiard==4.2.1

Upgraded dependencies:

- msgpack==1.0.8
- pyzmq==26.0.3
- tornado==6.4.1

This is minor version upgrade with the following updates:

- Upgraded dependencies which also fixes security vulnerabilities
- billiard==4.2.0
- msgpack==1.0.7
- pyzmq==25.1.1
- tornado==6.3.3

- Added support for Python 3.11 and 3.12

- Dropped support for Python 3.7

Simplified readme and documentation

Removed `click-repl` import from sqlite-client CLI

This is a minor release version upgrade with the following features and fixes

- Dropped support for Python 3.6 and added support for Python 3.10
- CLI dependencies are defined as an `extras_requirement` in setup.py. By default, cli dependencies are not installed.
- You can install it using `pip install 'sqlite-rx[cli]'`
- PEP 517 compliant build system
- Introduced setup.cfg
- Dev requirements in requirements_dev.txt
- Upgraded and pinned down versions of core dependencies
- Github actions update for Python versions 3.7, 3.8, 3.9, and 3.10
- Added MIT License text
- Better CLI for `sqlite-server` and `sqlite-client`
- Better handling for sqlite.backup API. Backup is neither supported on PyPy nor Windows