all: cleanup sqlite.connect statements (do not leave strange test.db or vweb.sql artefacts around, after running common tests)

vlib/v/tests/orm_stmt_wrong_return_checking_test.v

@@ -7,7 +7,7 @@ pub mut:
 }
 
 fn add_target(repo Target) !int {
-	mut dbs := sqlite.connect('test.db')!
+	mut dbs := sqlite.connect(':memory:')!
 	defer {
 		dbs.close() or { panic(err) }
 	}