fix: skip task if the options are undefined

[kik4]

ref: #25

Jest inline snapshot testing fails when prettier-plugin-tailwind is installed.
Because the argument options is undefined when ran by jest.

This skip running the task when options is undefined.

[cassus]

Thanks for fixing this!

Do you have an idea when this could be released?

[kik4]

I hope it will be released as soon as possible.