Nit: Fix InsertBuilder .Into() argument name (#375)

insert.go

diff --git a/insert.go b/insert.go
index c23a579..9787078 100644
--- a/insert.go
+++ b/insert.go
@@ -242,8 +242,8 @@
 }
 
 // Into sets the INTO clause of the query.
-func (b InsertBuilder) Into(from string) InsertBuilder {
-	return builder.Set(b, "Into", from).(InsertBuilder)
+func (b InsertBuilder) Into(into string) InsertBuilder {
+	return builder.Set(b, "Into", into).(InsertBuilder)
 }
 
 // Columns adds insert columns to the query.