Bump SQLx to 0.8 #2171

Job	Run time
Build `sea-query-binder` (async-std, rustls)	2m 0s
Build `sea-query`	49s
Build `sea-query-postgres`	48s
Clippy	1m 5s
Build `sea-query-rusqlite`	35s
Rustfmt	22s
Unit Test	1m 41s
Derive Tests	41s
Any	1m 4s
MySQL (8, sqlx_mysql)	1m 20s
PostgreSQL (14.4, postgres)	59s
MySQL (5.7, sqlx_mysql)	1m 30s
MariaDB (10.6, sqlx_mysql)	1m 13s
PostgreSQL (14.4, sqlx_postgres)	1m 17s
SQLite (rusqlite)	20s
PostgreSQL (13.7, postgres)	53s
SQLite (sqlx_sqlite)	57s
PostgreSQL (13.7, sqlx_postgres)	1m 17s
PostgreSQL (12.11, postgres)	52s
PostgreSQL (12.11, sqlx_postgres)	1m 20s
	21m 3s

Provide feedback