Update to cucumber 4 (#122)

Gemfile.lock

@@ -3,7 +3,7 @@ PATH
   specs:
     allure-cucumber (2.13.5.rc.3)
       allure-ruby-commons (= 2.13.5.rc.3)
-      cucumber (>= 4.0.0.rc6)
+      cucumber (>= 4.0.0)
 
 PATH
   remote: allure-rspec
@@ -39,7 +39,7 @@ GEM
     coderay (1.1.2)
     colorize (0.8.1)
     concurrent-ruby (1.1.6)
-    cucumber (4.0.0.rc.6)
+    cucumber (4.0.0)
       builder (~> 3.2, >= 3.2.3)
       cucumber-core (~> 7.0, >= 7.0.0)
       cucumber-cucumber-expressions (~> 10.1, >= 10.1.0)
@@ -54,7 +54,7 @@ GEM
       cucumber-gherkin (~> 13.0, >= 13.0.0)
       cucumber-messages (~> 12.1, >= 12.1.1)
       cucumber-tag-expressions (~> 2.0, >= 2.0.4)
-    cucumber-cucumber-expressions (10.1.0)
+    cucumber-cucumber-expressions (10.2.0)
     cucumber-gherkin (13.0.0)
       cucumber-messages (~> 12.0, >= 12.0.0)
     cucumber-html-formatter (6.0.2)
@@ -69,7 +69,7 @@ GEM
     diff-lcs (1.3)
     docile (1.3.2)
     e2mmap (0.1.0)
-    ffi (1.12.2)
+    ffi (1.13.0)
     i18n (1.8.2)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.4)
@@ -82,7 +82,7 @@ GEM
     middleware (0.1.0)
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2020.0425)
+    mime-types-data (3.2020.0512)
     mini_portile2 (2.4.0)
     minitest (5.14.1)
     multi_test (0.1.2)

allure-cucumber/allure-cucumber.gemspec

@@ -28,5 +28,5 @@ Gem::Specification.new do |s|
   s.require_path = "lib"
 
   s.add_dependency "allure-ruby-commons", version
-  s.add_dependency "cucumber" , ">= 4.0.0.rc6"
+  s.add_dependency "cucumber" , ">= 4.0.0"
 end