Polishing.

Fix test.

See #628

src/test/java/org/springframework/data/r2dbc/convert/MappingR2dbcConverterUnitTests.java

@@ -41,9 +41,9 @@ import org.springframework.core.convert.converter.Converter;
 import org.springframework.dao.InvalidDataAccessApiUsageException;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.annotation.Transient;
-import org.springframework.data.convert.CustomConversions;
 import org.springframework.data.convert.ReadingConverter;
 import org.springframework.data.convert.WritingConverter;
+import org.springframework.data.r2dbc.dialect.PostgresDialect;
 import org.springframework.data.r2dbc.mapping.OutboundRow;
 import org.springframework.data.r2dbc.mapping.R2dbcMappingContext;
 import org.springframework.data.relational.core.mapping.RelationalMappingContext;
@@ -63,7 +63,7 @@ public class MappingR2dbcConverterUnitTests {
 	@BeforeEach
 	void before() {
 
-		R2dbcCustomConversions conversions = new R2dbcCustomConversions(CustomConversions.StoreConversions.NONE,
+		R2dbcCustomConversions conversions = R2dbcCustomConversions.of(PostgresDialect.INSTANCE,
 				Arrays.asList(StringToMapConverter.INSTANCE, MapToStringConverter.INSTANCE,
 						CustomConversionPersonToOutboundRowConverter.INSTANCE, RowToCustomConversionPerson.INSTANCE));