SQLx

Address clippy warnings and add to gh actions #287

Job	Run time
Unit Test (tokio, rustls)	57s
Format	9s
Check (async-std, native-tls)	35s
Check (tokio, native-tls)	36s
CLI Binaries (ubuntu-latest)	55s
Check (tokio, rustls)	41s
Check (async-std, rustls)	54s
CLI Binaries (windows-latest)	1m 43s
MSSQL	-1s
MariaDB	-1s
SQLite	-1s
MySQL	-1s
Postgres with SSL client cert	-1s
Postgres	0s
	6m 25s

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