Support reek 2.0 and 2.1

Author: MGotink

lib/metric_fu/metrics/reek/generator.rb

@@ -15,7 +15,12 @@ def emit
     end
 
     def run!(files, config_files)
-      require "reek"
+      require 'reek'
+      begin
+        require 'reek/configuration/app_configuration'
+      rescue LoadError
+        # nothing we can do, it's probably an older reek version which doesn't need this file
+      end
 
       Reek::Examiner.new(files, config_files)
     end

metric_fu.gemspec

@@ -45,7 +45,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency "flay",                  [">= 2.0.1",  "~> 2.1"]
   s.add_runtime_dependency "churn",                 ["~> 0.0.35"]
   s.add_runtime_dependency "flog",                  [">= 4.1.1",  "~> 4.1"]
-  s.add_runtime_dependency "reek",                  [">= 1.3.4",  "~> 1.3"]
+  s.add_runtime_dependency "reek",                  [">= 1.3.4",  "< 2.2"]
   s.add_runtime_dependency "cane",                  [">= 2.5.2",  "~> 2.5"]
   s.add_runtime_dependency "rails_best_practices",  [">= 1.14.3", "~> 1.14"]
   s.add_runtime_dependency "metric_fu-Saikuro",     [">= 1.1.3",  "~> 1.1"]