closing connection on exit

### Description

any possibility to close the connection like in pymodbus ?
i.e client.close()

### Reproduction steps

-

### MicroPython version

-

### MicroPython board

ESP32

### MicroPython Modbus version

```python
latest
```


### Relevant log output

```bash
-
```


### User code

```python
-
```


### Additional informations

_No response_