Merge pull request #1384 from mattn/raise-go121-cleanup

Raise minimum Go version to 1.21

Author: mattn

go.mod

@@ -1,6 +1,6 @@
 module github.com/mattn/go-sqlite3
 
-go 1.19
+go 1.21
 
 retract (
  [v2.0.0+incompatible, v2.0.6+incompatible] // Accidental; no major changes or features.

sqlite3_go113_test.go

@@ -3,15 +3,14 @@
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file.
 
-//go:build cgo && go1.8
-// +build cgo,go1.8
+//go:build cgo
+// +build cgo
 
 package sqlite3
 
 import (
-	"database/sql/driver"
-
 	"context"
+	"database/sql/driver"
 )
 
 // Ping implement Pinger.