update path-to-regexp to v2

Author: haoxin

Readme.md

@@ -32,7 +32,7 @@ app.use(rewrite('/:src..:dst', '/commits/:src/to/:dst'));
   for example `/js/vendor/jquery.js` would become `/public/assets/js/vendor/jquery.js`:
 
 ```js
-app.use(rewrite('/js/*', '/public/assets/js/$1'));
+app.use(rewrite('/js/(.*)', '/public/assets/js/$1'));
 ```
 
 ## Debugging

package.json

@@ -24,7 +24,7 @@
   "license": "MIT",
   "dependencies": {
     "debug": "*",
-    "path-to-regexp": "0.0.2"
+    "path-to-regexp": "^2.1.0"
   },
   "engines": {
     "node": ">= 4"

test/test.js

@@ -51,10 +51,10 @@ describe('new Koa-rewrite', () => {
     .expect('/commits/foo/to/bar', done);
   });
 
-  it('rewrite /js/* -> /public/assets/js/$1', done => {
+  it('rewrite /js/(.*) -> /public/assets/js/$1', done => {
     const app = new Koa();
     app.use(differentPathHelper);
-    app.use(rewrite('/js/*', '/public/assets/js/$1'));
+    app.use(rewrite('/js/(.*)', '/public/assets/js/$1'));
     app.use((ctx) => {
       ctx.body = ctx.path;
     });