A2S Ping broken by typo

[Shaensi]

The Ping function in valve.source.a2s has a typo that causes the following error: NameError: name 'monontic' is not defined

This typo is on line 68 in the following code: time_sent = monontic.monotonic()

It appears that monotonic was accidentally typed as monontic

• Python-valve Version(s): 0.2.1
• Python Version(s): 3.7.2
• Operating System(s)/Platform(s): Windows
• Game Server(s) and Version(s): Space Engineers

[Shaensi]

It appears line 72 also attempts to reference t_sent when it should be using time_sent

[Yepoleb]

This has already been fixed, the package is just outdated.