Removing all the default: null from the documentation

packaging/npm

@@ -31,17 +31,14 @@ options:
     description:
       - The name of a node.js library to install
     requires: false
-    default: null
   path:
     description:
       - The base path where to install the node.js libraries
     required: false
-    default: null
   version:
     description:
       - The version to be installed
     required: false
-    default: null
   global:
     description:
       - Install the node.js library globally
@@ -53,7 +50,6 @@ options:
       - The executable location for npm.
       - This is useful if you are using a version manager, such as nvm
     required: false
-    default: null
   production:
     description:
       - Install dependencies in production mode, excluding devDependencies