Add verbosity flag to 'www'
Add verbosity flag to 'www'

Use stderrlog to log to stderr when the user increases verbosity
with -v. With -vvvv TRACE messages from the webdriver_client are
visible.

fluffysquirrels/webdriver_client_rust,fluffysquirrels/webdriver_client_rust,fluffysquirrels/webdriver_client_rust