Add a basic type definition for TypeScript.

Author: dmitrizagidulin

package.json

@@ -22,6 +22,7 @@
   },
   "license": "BSD-3-Clause",
   "main": "lib/index.js",
+  "types": "types/index.d.ts",
   "files": [
     "dist/*.js",
     "dist/*.js.map",

types/index.d.ts

@@ -0,0 +1 @@
+declare module 'jsonld';