Update README.md

Author: brianmc

README.md

@@ -21,13 +21,12 @@ Proprietary, see the provided `license.md`.
 
 ## Autoloading
 
-[`Composer`](http://getcomposer.org) currently has a [MITM](https://github.com/composer/composer/issues/1074)
-security vulnerability.  However, if you wish to use it, require its autoloader in
+We recommend using [`Composer`](http://getcomposer.org), don't forget to require its autoloader in
 your script or bootstrap file:
 ```php
 require 'vendor/autoload.php';
 ```
-*Note: you'll need a composer.json file with the following require section and to run
+*Update your composer.json file as per the example below and then run
 `composer update`.*
 
 ```json