SQLx

Address clippy warnings and add to gh actions #279

Job	Run time
Format	16s
Clippy (async-std, native-tls)	1m 6s
Clippy (tokio, rustls)	52s
Check (tokio, native-tls)	33s
CLI Binaries (windows-latest)	3m 57s
Unit Test (tokio, rustls)	1m 7s
Clippy (async-std, rustls)	1m 3s
Clippy (tokio, native-tls)	51s
Check (async-std, rustls)	43s
CLI Binaries (ubuntu-latest)	43s
Check (async-std, native-tls)	32s
Check (tokio, rustls)	30s
MySQL	-1s
Postgres	-1s
SQLite	-1s
MSSQL	-1s
MariaDB	-1s
Postgres with SSL client cert	-1s
Clippy per Database	-1s
	12m 6s

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