Add TypeScript type definitions #32 (#34)

index.d.ts

@@ -0,0 +1,13 @@
+type Options = {
+  custom?: string[] | { [key: string]: string; };
+  lang?: string;
+  maintainCase?: boolean;
+  replacement?: string;
+  separator?: string;
+  separateNumbers?: boolean;
+  tone?: boolean;
+} | string;
+
+declare function slug(text: string, opt?: Options): string;
+
+export = slug;

package.json

@@ -2,6 +2,7 @@
   "name": "limax",
   "version": "1.7.0",
   "main": "./lib/limax",
+  "types": "index.d.ts",
   "description": "Node.js module to generate URL slugs. Another one? This one cares about i18n and transliterates non-Latin scripts to conform to the RFC3986 standard. Mostly API-compatible with similar modules.",
   "repository": {
     "type": "git",