Handle unknown TERM signal on Windows

Process.kill('TERM') raises Errno::EINVAL on Windows

Author: p0deje

rb/lib/selenium/webdriver/common/child_process.rb

@@ -70,7 +70,7 @@ def stop(timeout = 3)
  poll_for_exit(timeout)
 
  WebDriver.logger.debug(" -> stopped #{@pid}")
- rescue TimeoutError
+ rescue TimeoutError, Errno::EINVAL
  WebDriver.logger.debug(" -> sending KILL to process: #{@pid}")
  kill(@pid)
  wait