feature: 打开网页的get现在默认为空字符，使用get()即可默认开启空页面 \ typo: _before_connect方法现命名为_process_connection，处理连接，_before_connect方法后续可能更新为执行页面访问前的内部操作

DrissionPage/_pages/chromium_base.py

@@ -496,7 +496,7 @@ class ChromiumBase(BasePage):
         Thread(target=run_js, args=(self, script, as_expr, self.timeouts.script if timeout is None else timeout,
                                     args)).start()
 
-    def get(self, url, show_errmsg=False, retry=None, interval=None, timeout=None):
+    def get(self, url='', show_errmsg=False, retry=None, interval=None, timeout=None):
         """访问url
         :param url: 目标url
         :param show_errmsg: 是否显示和抛出异常
@@ -505,7 +505,7 @@ class ChromiumBase(BasePage):
         :param timeout: 连接超时时间
         :return: 目标url是否可用
         """
-        retry, interval = self._before_connect(url, retry, interval)
+        retry, interval = self._process_connection(url, retry, interval)
         self._url_available = self._d_connect(self._url, times=retry, interval=interval,
                                               show_errmsg=show_errmsg, timeout=timeout)
         return self._url_available
@@ -924,7 +924,7 @@ class ChromiumBase(BasePage):
             pass
         return False
 
-    def _before_connect(self, url, retry, interval):
+    def _process_connection(self, url, retry, interval):
         """连接前的准备
         :param url: 要访问的url
         :param retry: 重试次数