atom: Update version from 1.8.0 to 1.9.0

Atom 1.9.0, released on July 29th, 2016, contains the following changes
[1][2].

> The following is a summary of improvements we have been testing on our
> beta channel and that are finally landing in Atom 1.9.0. 🚀
>
> *   Display Layers, which are going to bring speed improvements as
> well as new features like free-form folds (via the Fold Selection
> command) and an improved soft-wrapping algorithm.
> *   Electron Upgrade (v0.37.8), which features many performance
> improvements and enables efficient ligatures rendering on all the
> platforms.
> *   Drag and Drop Layout Management, that provides a very intuitive way
> for organizing the workspace.
> *   Enhanced Reliability When Saving Files, which minimizes the risk
> of losing files when a hard crash occurs.
> *   Shell Commands Compatibility On Windows, that makes the atom
> command compatible with both Cygwin and Msys.

[1] http://blog.atom.io/2016/08/01/atom-1-9-and-1-10-beta.html
[2] https://github.com/atom/atom/releases/tag/v1.9.0

atom.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION atom-1.8.0-0
+# BEE_VERSION atom-1.9.0-0
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)