0.3.3: Better console messages + improved shutdown

Improved console messages. Now eg. color coded and have timestamps – the latter can be useful when eg. testing a throttling mechanism

Improved handling of failed pings in non-sync flow – sometimes the server didn't close itself
Rename main file
Added linting tools to keep code quality high
Fix: Require correct file in executable
Linting fixes
Moved some functions to a class
Updated README
0.4.1 Some minor additions and tweaks

* Includes the HTTP code for a failure response and if there's a Retry-After header – print it
* Uses the new `chalk.dim()` rather than `chalk.grey()` for the dim parts of the log – timestamp etc.
* Updated some dependencies
Added checkmention templates
Adapted checkmention checks to the other templates
New version 0.4.2
Fix for when a ping request times out