update readme

README.md

@@ -5,7 +5,7 @@ A minimalistic Aspect-Oriented Programming (AOP) implementation for PHP that use
 ## Installation
 
 ```bash
-composer install
+composer install icefox/aspect
 ```
 
 ## Usage
@@ -62,7 +62,7 @@ $loader = AspectBuilder::begin()
     // list of class names
     ->withClasses([ MyClass::class ])
     // namespace prefix
-    ->withNamespaces([ "MyApplication\" ])
+    ->withNamespaces([ "MyApplication\\" ])
     ->build($weaver)
     ->register();
 ```