Merge pull request #2209 from jjtt/enum-value-tostring

Implement BinaryStreamReader.EnumValue.toString()

Author: chernser

client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java

@@ -728,6 +728,11 @@ public float floatValue() {
         public double doubleValue() {
             return value;
         }
+
+        @Override
+        public String toString() {
+            return name;
+        }
     }
 
     /**