Include typescript declarations in npm package (#178)

Author: rosskevin

src/index.d.ts renamed to index.d.ts

@@ -3,9 +3,11 @@
   "version": "0.3.10",
   "description": "Extensible route-based routing for React applications",
   "files": [
-    "lib"
+    "lib",
+    "index.d.ts"
   ],
   "main": "lib/index.js",
+  "types": "index.d.ts",
   "scripts": {
     "build": "rimraf lib && babel src -d lib",
     "format": "eslint --fix examples/*/src src test && prettier --write '{src,test}/**/*.{ts,tsx}'",

package.json

@@ -14,5 +14,5 @@
     "noEmit": true,
     "experimentalDecorators": true
   },
-  "include": ["src/**/*", "test/typescript/*"]
+  "include": ["index.d.ts", "test/typescript/*"]
 }