Use pgx v5 and update changelog

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Added
+
+- Support for MySQL.
+
+### Changed
+
+- The "postgres" driver name is now called "postgresql".
+
 ## [0.4.0] - 2024-03-09
 
 ### Changed

go.mod

@@ -7,20 +7,17 @@ require (
 	github.com/eugenetriguba/checkmate v0.3.2
 	github.com/go-sql-driver/mysql v1.8.0
 	github.com/google/subcommands v1.2.0
-	github.com/jackc/pgx/v4 v4.18.3
+	github.com/jackc/pgx/v5 v5.5.5
 	github.com/kelseyhightower/envconfig v1.4.0
 )
 
 require (
 	filippo.io/edwards25519 v1.1.0 // indirect
 	github.com/google/go-cmp v0.6.0 // indirect
-	github.com/jackc/chunkreader/v2 v2.0.1 // indirect
-	github.com/jackc/pgconn v1.14.3 // indirect
-	github.com/jackc/pgio v1.0.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
-	github.com/jackc/pgproto3/v2 v2.3.3 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
-	github.com/jackc/pgtype v1.14.0 // indirect
+	github.com/jackc/puddle/v2 v2.2.1 // indirect
 	golang.org/x/crypto v0.20.0 // indirect
+	golang.org/x/sync v0.1.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 )