Corrects a typo when specifying dependencies.

[yundt]

I believe there's a typo in the dependency specification:

mareknowak@Mareks-MacBook-Pro: ~/stuff/riemann-tools master
$ rake gem                                                                   [12:44:39]
rake aborted!
Gem::Requirement::BadRequirementError: Illformed requirement ["=> 1.22.0"]
/Users/mareknowak/stuff/riemann-tools/Rakefile.rb:31:in `block in <top (required)>'
/Users/mareknowak/stuff/riemann-tools/Rakefile.rb:11:in `new'
/Users/mareknowak/stuff/riemann-tools/Rakefile.rb:11:in `<top (required)>'
(See full trace by running task with --trace)
FAIL: 1

mareknowak@Mareks-MacBook-Pro: ~/stuff/riemann-tools master
$ sed -i "" "s/=>/>=/g" Rakefile.rb                                          [12:44:49]

mareknowak@Mareks-MacBook-Pro: ~/stuff/riemann-tools master ⚡
$ rake gem                                                                   [12:44:55]
# irrelevant output truncated
  Successfully built RubyGem
  Name: riemann-tools
  Version: 0.2.6
  File: riemann-tools-0.2.6.gem
# irrelevant output truncated

I have looked for mentions of the => operator, but couldn't find anything.

[aphyr]

Good catch, thanks!