Allow BLOB columns with utf8mb3 charset

Author: Juan Ferrer Toribio

lib/common.js

@@ -440,8 +440,17 @@ exports.readMysqlValue = function(
       // e.g. TINYTEXT, MEDIUMTEXT, LONGTEXT, TEXT data types
       if (column.charset !== null) {
         // Javascript UTF8 always allows up to 4 bytes per character
-        column.charset = column.charset === 'utf8mb4' ? 'utf8' : column.charset;
-        result = iconv.decode(result, column.charset);
+        switch (column.charset) {
+          case 'utf8mb3':
+          case 'utf8mb4':
+            column.charset = 'utf8';
+            break;
+        }
+        try {
+          result = iconv.decode(result, column.charset);
+        } catch (err) {
+          console.warn(err);
+        }
       }
       break;
     case MysqlTypes.JSON: