Check redis version before testValueSize

redisson/src/test/java/org/redisson/RedissonMapTest.java

@@ -155,6 +155,7 @@ public class RedissonMapTest extends BaseTest {
 
     @Test
     public void testValueSize() {
+        Assume.assumeTrue(RedisRunner.getDefaultRedisServerInstance().getRedisVersion().compareTo("3.2.0") > 0);
         RMap<String, String> map = redisson.getMap("getAll");
         map.put("1", "1234");
         assertThat(map.valueSize("4")).isZero();