chore: cleanup dependencies

go.mod

@@ -3,27 +3,13 @@ module gorm.io/plugin/optimisticlock
 go 1.17
 
 require (
-	github.com/stretchr/testify v1.7.0
-	gorm.io/driver/postgres v1.3.1
 	gorm.io/driver/sqlite v1.2.6
 	gorm.io/gorm v1.23.8
 )
 
 require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/jackc/chunkreader/v2 v2.0.1 // indirect
-	github.com/jackc/pgconn v1.10.1 // indirect
-	github.com/jackc/pgio v1.0.0 // indirect
-	github.com/jackc/pgpassfile v1.0.0 // indirect
-	github.com/jackc/pgproto3/v2 v2.2.0 // indirect
-	github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b // indirect
-	github.com/jackc/pgtype v1.9.1 // indirect
-	github.com/jackc/pgx/v4 v4.14.1 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/mattn/go-sqlite3 v1.14.9 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/crypto v0.17.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0 // indirect
 )