Apostrophe in the custom option is ignored

[david-benes]

Expected behavior:

>limax("wendy's", {custom: ["'"]})
wendy's

Actual behavior:

>limax("wendy's", {custom: ["'"]})
wendys

The separateApostrophes option does not help here.

[lovell]

Hi, this looks like a bug. I guess the following RegEx should exclude any chars that are included in custom:

limax/lib/limax.js

Lines 20 to 23 in ffdcda7

	text = text.replace(
	/(\S)['\u2018\u2019\u201A\u201B\u2032\u2035\u0301](\S)/g, // eslint-disable-line no-misleading-character-class
	options.separateApostrophes === true ? '$1 $2' : '$1$2'
	);

Happy to accept a PR if you're able.

[david-benes]

I figured out that there are more similar issues originating from speakingurl package on which limax depends. Fixing this issue #39 won't help much unless the upstream issue pid/speakingurl#124 is resolved first.