Stick to supporting two last Ruby versions for sanity

.travis.yml

@@ -1,7 +1,5 @@
 script: bundle exec rubocop && bundle exec cucumber && bundle exec cucumber -p validate
 language: ruby
 rvm:
-  - 2.3.0
-  - 2.3.1
-  - 2.4.0
+  - 2.4.3
   - 2.5.0

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gem "sinatra"
 gem "erubis", "~> 2.7.0"
-gem "ridley", "~> 5.0.0"
+gem "ridley", "~> 5.1.1"
 gem "tinyconfig", "~> 0.1"
 gem "oj", platforms: :ruby         # to be used by multijson
 gem "jrjackson", platforms: :jruby # to be used by multijson
@@ -19,8 +19,9 @@ gem 'rugged', '= 0.21.1b2'      # github-linguist specifies (~> 0.21.1b2), but 0
 
 group :development do
   gem "capybara"
-  gem "chef-zero"
+  gem "chef-zero", "~> 14.0.0"
   gem "cucumber"
+  gem "ffi"
   gem "rack-test"
   gem "rubocop"
   gem "wrong", "= 0.7.1"

Gemfile.lock

@@ -9,9 +9,9 @@ GEM
       varia_model (~> 0.6)
     buff-extensions (2.0.0)
     buff-ignore (1.2.0)
-    buff-ruby_engine (0.1.0)
-    buff-shell_out (0.2.0)
-      buff-ruby_engine (~> 0.1.0)
+    buff-ruby_engine (1.0.0)
+    buff-shell_out (1.1.0)
+      buff-ruby_engine (~> 1.0)
     builder (3.2.3)
     capybara (3.0.1)
       addressable
@@ -54,8 +54,9 @@ GEM
     diff-lcs (1.2.5)
     erubis (2.7.0)
     escape_utils (1.0.1)
-    faraday (0.9.2)
+    faraday (0.14.0)
       multipart-post (>= 1.2, < 3)
+    ffi (1.9.23)
     ffi-yajl (2.3.1)
       libyajl2 (~> 1.2)
     ffi2-generators (0.1.1)
@@ -115,17 +116,17 @@ GEM
     rainbow (3.0.0)
     rake (12.3.1)
     retryable (2.0.4)
-    ridley (5.0.0)
+    ridley (5.1.1)
       addressable
       buff-config (~> 2.0)
       buff-extensions (~> 2.0)
       buff-ignore (~> 1.2)
-      buff-shell_out (~> 0.1)
+      buff-shell_out (~> 1.0)
       celluloid (~> 0.16.0)
       celluloid-io (~> 0.16.1)
       chef-config (>= 12.5.0)
       erubis
-      faraday (~> 0.9.0)
+      faraday (~> 0.9)
       hashie (>= 2.0.2, < 4.0.0)
       httpclient (~> 2.7)
       json (>= 1.7.7)
@@ -383,11 +384,12 @@ PLATFORMS
 
 DEPENDENCIES
   capybara
-  chef-zero
+  chef-zero (~> 14.0.0)
   coderay
   cucumber
   deep_merge
   erubis (~> 2.7.0)
+  ffi
   github-linguist (~> 3.0)
   github-markup
   jrjackson
@@ -399,7 +401,7 @@ DEPENDENCIES
   racc
   rack-test
   rake
-  ridley (~> 5.0.0)
+  ridley (~> 5.1.1)
   rubocop
   rubysl (~> 2.0)
   rubysl-test-unit (~> 2.0)
@@ -409,4 +411,4 @@ DEPENDENCIES
   wrong (= 0.7.1)
 
 BUNDLED WITH
-   1.16.1
+   1.11.2