[ANN] graph 2.9.0 Released

graph version 2.9.0 has been released!

* home: <https://github.com/seattlerb/graph>

Graph is a type of hash that outputs in graphviz's dot format. It
comes with a command-line interface that is easily pluggable.

It ships with plugins to graph dependencies and status of installed
rubygems, rake tasks, homebrew ports, mac ports, and freebsd ports,
coloring leaf nodes blue, outdated nodes red, and outdated leaf nodes
purple (red+blue).

OSX quick tip: 

    % sudo gem install graph --development
    % sudo brew install graphviz
    % gem unpack graph
    % cd graph*
    % rake gallery
    % open gallery/*.png

Changes:

### 2.9.0 / 2019-09-24

* 3 minor enhancements:

  * Added ability to specify command to run on save. (tanalab2)
  * Added bg_<name> and fill_<name> methods for all colors.
  * Added bgcolor shortcut method.

* 1 bug fix:

  * Normalized all attribute value quoting.

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