Aiosql

This release:
- add support for MySQL, on top of Postgres and SQLite
- add support for more drivers : psycopg3, APSW
- refactors the base code significantly to reduce the line count
- CI covers Python 3.7 to 3.10
- add coverage tests to about 100%, including error paths
- updates dependencies and the doc accordingly
- switch to 2-level version numbering

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- 62 Fixes an off-by-one bug that affected variable name translation for the asyncpg driver. Thank you seandstewart for reporting the issue!
- Fixes documentation css styling via `.nojekyll` plugin for sphinx

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