need rake 0.8.7 for rake-compiler 0.7.9

Author: brianmario

mysql2.gemspec

@@ -18,6 +18,7 @@ Gem::Specification.new do |s|
   # tests
   s.add_development_dependency 'eventmachine'
   s.add_development_dependency 'rake-compiler', "~> 0.7.7"
+  s.add_development_dependency 'rake', '0.8.7' # NB: 0.8.7 required by rake-compiler 0.7.9
   s.add_development_dependency 'rspec'
   # benchmarks
   s.add_development_dependency 'activerecord'