Ensure caching config is compatible with v1

README.md

@@ -83,7 +83,7 @@ $r->addRoute('POST', '/test', 'handler');
 $r->addRoute(['GET', 'POST'], '/test', 'handler');
 ```
 
-By default the `$routePattern` uses a syntax where `{foo}` specifies a placeholder with name `foo`
+By default, the `$routePattern` uses a syntax where `{foo}` specifies a placeholder with name `foo`
 and matching the regex `[^/]+`. To adjust the pattern the placeholder matches, you can specify
 a custom pattern by writing `{bar:[0-9]+}`. Some examples:
 
@@ -142,7 +142,7 @@ $r->addRoute('POST', '/post-route', 'post_handler');
 
 #### Route Groups
 
-Additionally, you can specify routes inside of a group. All routes defined inside a group will have a common prefix.
+Additionally, you can specify routes inside a group. All routes defined inside a group will have a common prefix.
 
 For example, defining your routes as:
 
@@ -178,13 +178,15 @@ $dispatcher = FastRoute\cachedDispatcher(function(FastRoute\RouteCollector $r) {
     $r->addRoute('GET', '/user/{id:[0-9]+}', 'handler1');
     $r->addRoute('GET', '/user/{name}', 'handler2');
 }, [
-    'cacheFile' => __DIR__ . '/route.cache', /* required */
+    'cacheKey' => __DIR__ . '/route.cache', /* required */
+    // 'cacheFile' => __DIR__ . '/route.cache', /* will still work for v1 compatibility */
     'cacheDisabled' => IS_DEBUG_ENABLED,     /* optional, enabled by default */
+    'cacheDriver' => FastRoute\Cache\FileCache::class, /* optional, class name or instance of the cache driver - defaults to file cache */
 ]);
 ```
 
 The second parameter to the function is an options array, which can be used to specify the cache
-file location, among other things.
+key (e.g. file location when using files for caching), caching driver, among other things.
 
 ### Dispatching a URI