string-content rule: case insensitive matching

[skondrashov]

I'd like to be able to match a word case insensitively to be able to catch words that should be abbreviated in my project, eg End of Day -> EOD. I've tried using the (?i) regex mode modifier but it breaks the parsing, and using '/End of Day/i' doesn't work. Whatever the recommended way to do this is, even if it's just '[Ee][Nn][Dd]\\s+[Oo][Ff]\\s+[Dd][Aa][Yy]', could it be added to string-content.md?

[sindresorhus]

I think we could add a caseSensitive option to patterns:

{
	"unicorn/string-content": [
		"error",
		{
			"patterns": {
				"end of day": {
					"caseSensitive": false,
					"suggest": "😎",
					"fix": false
				}
			}
		}
	]
}