希望能升级对selenium4的支持

在本地selenium4的情况下运行airtest_selenium的driver.find_element_by_id
会提示UserWarning: find_element_by_* commands are deprecated. Please use find_element() instead
这个warning不理会也没问题，还是觉得老的写法方便。
下面我把proxy.py文件里的loop_find_element增加了个by参数
```python
def loop_find_element(self, func,by, text, timeout=10, interval=0.5):
"""
Loop to find the target web element by func.

Args:
func: function to find element
text: param of function
timeout: time to find the element
interval: interval between operation
Returns:
element that been found
"""
start_time = time.time()
while True:
try:
element = func(by,text)
except NoSuchElementException:
print("Element not found!")
# 超时则raise，未超时则进行下次循环:
if (time.time() - start_time) > timeout:
# try_log_screen(screen)
raise NoSuchElementException(
'Element %s not found in screen' % text)
else:
time.sleep(interval)
else:
return element
```
把find_element_by_id改成了如下
```python
def find_element_by_id(self, id):
"""
Find the web element by id.

Args:
id: find the element by attribute id.
Returns:
Web element of current page.
"""
web_element = self.loop_find_element(super(WebChrome, self).find_element,By.ID, id)
log_res = self._gen_screen_log(web_element)
return Element(web_element, log_res)
```
这样既能享受老版本的find_element_by_id的方便，还不会因为selenium版本太高而总弹出warning，不会pr，只能贴到这里了，希望能更新下，非常感谢。