Fix rake dependency constraints for older Ruby versions

Author: floehopper

mocha.gemspec

@@ -31,12 +31,16 @@ Gem::Specification.new do |s| # rubocop:disable Metrics/BlockLength
     end
   end
 
-  if RUBY_VERSION >= '1.9.3'
-    s.add_development_dependency('rake')
+  if RUBY_VERSION < '1.9.3'
+    s.add_development_dependency 'rake', '~> 10.0'
+  elsif RUBY_VERSION < '2'
+    s.add_development_dependency 'rake', '~> 12.2.1'
+  elsif RUBY_VERSION < '2.2'
+    s.add_development_dependency 'rake', '~> 12.3.3'
   else
-    # Rake >= v11 does not support Ruby < v1.9.3 so use
-    s.add_development_dependency('rake', '~> 10.0')
+    s.add_development_dependency 'rake'
   end
+
   s.add_development_dependency('introspection', '~> 0.0.1')
   if RUBY_VERSION >= '2.2.0'
     # No test libraries in standard library