Case insensitive searches do not work for some Turkish words

[bschlenk]

Describe the bug

Turkish has specific rules for how I is lowercased, so some words are not found when expected. For example, the string Satış Teklifleri will not be found when searching for satış teklİflerİ.

Version

6.6.2

Is this a regression?

Not a regression

🔬Minimal Reproduction

const list = [
  { title: 'Satış Teklifleri' }
];

const fuse = new Fuse(list, { keys: ['title'] });

// results should contain 1 result, but contains 0
const results = fuse.search('satış teklİflerİ')

Additional context

This can be fixed by doing a find/replace for toLowerCase -> toLocaleLowerCase. This does require the end user's browser/os locale to be set to Turkish, but I think that is reasonable.

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