Changed to correct type

Author: vilmosioo

angularjs/angular.d.ts

@@ -1414,7 +1414,7 @@ declare module angular {
     * https://docs.angularjs.org/api/ng/service/$http#defaults
     */
     interface IHttpProviderDefaults {
-    	cache?: true;
+        cache?: boolean;
         xsrfCookieName?: string;
         xsrfHeaderName?: string;
         withCredentials?: boolean;