toml: use toml.parse_text and toml.parse_file in the tests

vlib/toml/tests/default_to_test.v

@@ -3,7 +3,7 @@ import toml
 fn test_default_to() {
 	default_value := 4321
 	mut toml_txt := 'var = 1234'
-	toml_doc := toml.parse(toml_txt) or { panic(err) }
+	toml_doc := toml.parse_text(toml_txt) or { panic(err) }
 	value := toml_doc.value('tar').default_to(default_value).int()
 	assert value == default_value
 }