fix style code error

types/navigo/index.d.ts

@@ -2,9 +2,10 @@
 // Project: https://github.com/krasimir/navigo
 // Definitions by: Adrian Ehrsam <https://github.com/aersamkull>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
 
-type Keys = string
-type State = {[k in Keys]: any}
+type Keys = string;
+type State = {[k in Keys]: any};
 type Params = State;
 
 interface NavigoHooks {
@@ -46,7 +47,7 @@ declare class Navigo {
     resolve(currentURL?: string): boolean;
 
     link(path: string): string;
-    
+
     lastRouteResolved(): {url: string, query: string};
 
     disableIfAPINotAvailable(): void;

types/navigo/navigo-tests.ts

@@ -1,14 +1,22 @@
 import Navigo = require("navigo");
 
+type Keys = string;
+type State = {[k in Keys]: any};
+type Params = State;
+
 const root = null;
 const useHash = false;
 
 let router = new Navigo(root, useHash);
 
+const before = (done: (suppress?: boolean) => void, params: Params) => done();
+
+const after = (params: Params) => params;
+
 router.hooks({
-    before: function(done, params) { //do something },
-    after: function(params) { //do something }
-  });
+    before,
+    after
+});
 
 router
     .on('/products/list', () => {