add note about customization

Author: filipesilva

public/docs/ts/latest/cookbook/third-party-lib.jade

@@ -102,6 +102,7 @@ code-example(language="json").
   This example repository has an implemention of the described package format but is by no means
   the only way you should publish a library.
   Any setup that builds the necessary package format works just as well for a consumer.
+  You are encouraged to customize this process as you see fit.
 
 :marked
   Make sure you have at least Node 6.9 and NPM 3.0 installed.