Bump cucumber

Gemfile.lock

@@ -117,16 +117,16 @@ GEM
     connection_pool (2.2.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    cucumber (2.3.3)
+    cucumber (2.4.0)
       builder (>= 2.1.2)
-      cucumber-core (~> 1.4.0)
+      cucumber-core (~> 1.5.0)
       cucumber-wire (~> 0.0.1)
       diff-lcs (>= 1.1.3)
-      gherkin (~> 3.2.0)
+      gherkin (~> 4.0)
       multi_json (>= 1.7.5, < 2.0)
       multi_test (>= 0.1.2)
-    cucumber-core (1.4.0)
-      gherkin (~> 3.2.0)
+    cucumber-core (1.5.0)
+      gherkin (~> 4.0)
     cucumber-rails (1.4.3)
       capybara (>= 1.1.2, < 3)
       cucumber (>= 1.3.8, < 3)
@@ -348,7 +348,7 @@ GEM
     fuubar (2.0.0)
       rspec (~> 3.0)
       ruby-progressbar (~> 1.4)
-    gherkin (3.2.0)
+    gherkin (4.0.0)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
     gon (6.0.1)