Json type 150 is not handled

Received this error whilst listening to binlogs in AWS RDS:

```
Traceback (most recent call last):
File "/usr/local/lib/python3.7/threading.py", line 917, in _bootstrap_inner
self.run()
File "/usr/local/lib/python3.7/threading.py", line 865, in run
self._target(*self._args, **self._kwargs)
File "./main.py", line 25, in startDBListener
"secret": gfire
File "/usr/src/app/database_listener.py", line 47, in listen
for row in binlogevent.rows:
File "/usr/local/lib/python3.7/site-packages/pymysqlreplication/row_event.py", line 427, in rows
self._fetch_rows()
File "/usr/local/lib/python3.7/site-packages/pymysqlreplication/row_event.py", line 422, in _fetch_rows
self.__rows.append(self._fetch_one_row())
File "/usr/local/lib/python3.7/site-packages/pymysqlreplication/row_event.py", line 511, in _fetch_one_row
row["before_values"] = self._read_column_data(self.columns_present_bitmap)
File "/usr/local/lib/python3.7/site-packages/pymysqlreplication/row_event.py", line 181, in _read_column_data
values[name] = self.packet.read_binary_json(column.length_size)
File "/usr/local/lib/python3.7/site-packages/pymysqlreplication/packet.py", line 352, in read_binary_json
return self.read_binary_json_type(t, length)
File "/usr/local/lib/python3.7/site-packages/pymysqlreplication/packet.py", line 385, in read_binary_json_type
raise ValueError('Json type %d is not handled' % t)
ValueError: Json type 150 is not handled
```

Start in pymysqlreplication/packet.py at read_binary_json_type and trace how read_binary_json handles the type value reported as 150. Check the row-event caller in pymysqlreplication/row_event.py and reproduce the AWS RDS binlog case if possible. Done means the affected JSON value is decoded without the unhandled-type error.

Written by the indexing model from the issue text.