Made read String as String by default. Option is to read as BinaryString with typehinting

Author: chernser

client-v2/src/main/java/com/clickhouse/client/api/ClientConfigProperties.java

@@ -177,10 +177,7 @@ public Object parseValue(String value) {
      * Defines mapping between ClickHouse data type and target Java type
      * Used by binary readers to convert values into desired Java type.
      */
-    TYPE_HINT_MAPPING("type_hint_mapping", Map.class,
-            "String=" + BinaryString.class.getName()
-
-    ),
+    TYPE_HINT_MAPPING("type_hint_mapping", Map.class),
 
     /**
      * SNI SSL parameter that will be set for each outbound SSL socket.

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

@@ -83,7 +83,7 @@ protected AbstractBinaryFormatReader(InputStream inputStream, QuerySettings quer
                                          BinaryStreamReader.ByteBufferAllocator byteBufferAllocator,
                                          Map<ClickHouseDataType, Class<?>> defaultTypeHintMap) {
         this.input = inputStream;
-        this.defaultTypeHintMap = defaultTypeHintMap;
+        this.defaultTypeHintMap = defaultTypeHintMap == null ? Collections.emptyMap() : defaultTypeHintMap;
         Map<String, Object> settings = querySettings == null ? Collections.emptyMap() : querySettings.getAllSettings();
         Boolean useServerTimeZone = (Boolean) settings.get(ClientConfigProperties.USE_SERVER_TIMEZONE.getKey());
         TimeZone timeZone = (useServerTimeZone == Boolean.TRUE && querySettings != null) ?