'Or' functionality broken (using |)

[FingalP]

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Please describe the minimum necessary steps to reproduce this issue:

npm i micromatch@3

> micromatch = require('micromatch')
> micromatch(['foo'], 'foo|bar')
[ 'foo' ]

npm i micromatch@4

> micromatch = require('micromatch')
> micromatch(['foo'], 'foo|bar')
[]

What is happening that shouldn't be? / What should be happening instead?

We should be seeing a match (['foo']) when using version 4, just like we do with version 3.

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Interestingly it works on both versions with round brackets around each option, e.g.:

micromatch(['foo'], '(foo)|(bar)')

However, we need it to work without the brackets.