add unopinionated preset

[RicardoValdovinos]

Hello,

I'd like to work on and resolve #896

Currently, I have disabled four rules

no-array-for-each
no-array-reduce
no-null
prefer-switch

I was also considering disabling

switch-case-braces
empty-brace-spaces

as these are more related to style and should probably be handled by a formatter.

Lastly, as referenced in #1636, I'd like to suggest modifying prevent-abbreviations default setting to allow standard abbreviations such as arg, args, db, and env. There may be others but these are the immediate ones that came to mind.

[devunt]

An other option is to make prettier preset separately for rules that conflicting with what prettier do.
Following rules can be disabled with prettier preset for now.

empty-brace-spaces
number-literal-case

[Zamiell]

@devunt Isn't that already covered by eslint-config-prettier? I don't think it needs to be in a separate config.

[sindresorhus]

See: #896 (comment)

Closing for now.