SQLx

Address clippy warnings and add to gh actions #293

Job	Run time
Unit Test (tokio, rustls)	43s
Check (tokio, native-tls)	35s
Check (async-std, native-tls)	38s
Check (async-std, rustls)	48s
Check (tokio, rustls)	1s
CLI Binaries (ubuntu-latest)	32s
CLI Binaries (windows-latest)	50s
Format	11s
SQLite	0s
MariaDB	0s
Postgres	0s
Postgres with SSL client cert	0s
MSSQL	0s
MySQL	0s
	4m 18s

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