tests

fix the CI: update bigdecimal and fix warnings #1969

Job	Run time
Rustfmt	18s
Build `sea-query-binder` (async-std, rustls)	3m 40s
Clippy	38s
Build `sea-query-postgres`	53s
Build `sea-query`	1m 43s
Build `sea-query-rusqlite`	35s
Derive Tests	1m 14s
Unit Test	1m 42s
Any	1m 52s
MySQL (8, sqlx_mysql)	2m 8s
MariaDB (10.6, sqlx_mysql)	1m 13s
MySQL (5.7, sqlx_mysql)	1m 23s
PostgreSQL (14.4, postgres)	1m 21s
PostgreSQL (14.4, sqlx_postgres)	1m 56s
SQLite (rusqlite)	27s
SQLite (sqlx_sqlite)	1m 48s
PostgreSQL (13.7, postgres)	45s
PostgreSQL (13.7, sqlx_postgres)	1m 17s
PostgreSQL (12.11, postgres)	1m 41s
PostgreSQL (12.11, sqlx_postgres)	2m 23s
	28m 57s

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