Allow optional time limit for chill mode

[mtrunt]

Description

Allow users so modify the time limit on the chill modes, from 10 seconds to 3 minutes.

For these changes the possibility of passing keyed options to the commands was added.
e.g. to start the game you would type !tfchill time 30 for a game with a 30 second time limit for each question.

closes #40

Type of change

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)

[elenirotsides]

Thank you for your PR @mtrunt ! I've made some comments and suggestions, please see below. Awesome job!

[mtrunt]

@elenirotsides I submitted the changes. One of the main things is the change on validateCommands return value. Instead of true for failure I changed it to false since it makes more sense IMO and the truthy value is the validated arguments now.

Let me know if you have any questions🙂

[elenirotsides]

Instead of true for failure I changed it to false since it makes more sense IMO and the truthy value is the validated arguments now.

I totally agree with you, thanks!

[elenirotsides]

Thank you so much for your contribution! The work you did here is fantastic! I'm just going to go ahead and commit the minor changes I've suggested below. Other than that, this is some really really good stuff here. Thanks again for the killer PR!

[mtrunt]

Thanks! I like the work you have done with the bot so far 😀