SQLx

Address clippy warnings and add to gh actions #283

Job	Run time
Unit Test (tokio, rustls)	29s
Check (async-std, rustls)	1s
Check (async-std, native-tls)	34s
CLI Binaries (windows-latest)	37s
Check (tokio, native-tls)	1s
Check (tokio, rustls)	1s
Format	9s
CLI Binaries (ubuntu-latest)	24s
MariaDB	0s
Postgres with SSL client cert	0s
SQLite	0s
Postgres	0s
MySQL	0s
MSSQL	0s
	2m 16s

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