feat: add russian language support (@lordoys)

Author: mesqueeb

src/utils.ts

@@ -4,15 +4,16 @@
 // lower case ranges
 // [à-öø-ÿ]
 
-export const magicSplit = /^[a-zà-öø-ÿ]+|[A-ZÀ-ÖØ-ß][a-zà-öø-ÿ]+|[a-zà-öø-ÿ]+|[0-9]+|[A-ZÀ-ÖØ-ß]+(?![a-zà-öø-ÿ])/g
+export const magicSplit =
+  /^[a-zà-öø-ÿа-я]+|[A-ZÀ-ÖØ-ßА-Я][a-zà-öø-ÿа-я]+|[a-zà-öø-ÿа-я]+|[0-9]+|[A-ZÀ-ÖØ-ßА-Я]+(?![a-zà-öø-ÿа-я])/g
 export const spaceSplit = /\S+/g
 
 /**
  * A string.matchAll function that will return an array of "string parts" and the indexes at which it split each part
  */
 export function getPartsAndIndexes(
   string: string,
-  splitRegex: RegExp
+  splitRegex: RegExp,
 ): {
   parts: string[]
   prefixes: string[]
@@ -48,7 +49,7 @@ export function getPartsAndIndexes(
  */
 export function splitAndPrefix(
   string: string,
-  options?: { keepSpecialCharacters?: boolean; keep?: string[]; prefix?: string }
+  options?: { keepSpecialCharacters?: boolean; keep?: string[]; prefix?: string },
 ): string[] {
   const { keepSpecialCharacters = false, keep, prefix = '' } = options || {}
   const normalString = string.trim().normalize('NFC')
@@ -63,7 +64,9 @@ export function splitAndPrefix(
 
       if (keepSpecialCharacters === false) {
         if (keep) {
-          part = part.normalize('NFD').replace(new RegExp(`[^a-zA-ZØßø0-9${keep.join('')}]`, 'g'), '')
+          part = part
+            .normalize('NFD')
+            .replace(new RegExp(`[^a-zA-ZØßø0-9${keep.join('')}]`, 'g'), '')
         }
         if (!keep) {
           part = part.normalize('NFD').replace(/[^a-zA-ZØßø0-9]/g, '')
@@ -106,5 +109,8 @@ export function splitAndPrefix(
 export function capitaliseWord(string: string): string {
   const match = string.matchAll(magicSplit).next().value
   const firstLetterIndex = match ? match.index : 0
-  return string.slice(0, firstLetterIndex + 1).toUpperCase() + string.slice(firstLetterIndex + 1).toLowerCase()
+  return (
+    string.slice(0, firstLetterIndex + 1).toUpperCase() +
+    string.slice(firstLetterIndex + 1).toLowerCase()
+  )
 }