Add typescript definitions

[adroste]

Great library!

Would be nice, if you'd add some simple typings like:

// index.d.ts
declare module 'levenshtein-search' {
  export function fuzzySearch(pattern: string, text: string, maxDistance: number): 
    IterableIterator<{ start: number, end: number, dist: number }>;

  export function editDistance(string1: string, string2: string): number;

  export function isEditDistanceNoGreaterThan(string1: string, string2: string, maxDistance: number): boolean;
}

[LoganDark]

Here's what I use:

declare module 'levenshtein-search' {
  export type FuzzyMatch = { start: number, end: number, dist: number }
  export function editDistance(a: string, b: string): number
  export function fuzzySearch(needle: string, haystack: string, maxDist: number): Iterable<FuzzyMatch>
  export function isEditDistanceNoGreaterThan(a: string, b: string, maxDist: number): boolean
}