Update gitlab-experiment to version 0.5.0

Gemfile

@@ -485,7 +485,7 @@ gem 'flipper', '~> 0.17.1'
 gem 'flipper-active_record', '~> 0.17.1'
 gem 'flipper-active_support_cache_store', '~> 0.17.1'
 gem 'unleash', '~> 0.1.5'
-gem 'gitlab-experiment', '~> 0.4.12'
+gem 'gitlab-experiment', '~> 0.5.0'
 
 # Structured logging
 gem 'lograge', '~> 0.5'

Gemfile.lock

@@ -436,7 +436,7 @@ GEM
     github-markup (1.7.0)
     gitlab-chronic (0.10.5)
       numerizer (~> 0.2)
-    gitlab-experiment (0.4.12)
+    gitlab-experiment (0.5.0)
       activesupport (>= 3.0)
       scientist (~> 1.5, >= 1.5.0)
     gitlab-fog-azure-rm (1.0.1)
@@ -1139,7 +1139,7 @@ GEM
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
-    scientist (1.5.0)
+    scientist (1.6.0)
     securecompare (1.0.0)
     seed-fu (2.3.7)
       activerecord (>= 3.1)
@@ -1413,7 +1413,7 @@ DEPENDENCIES
   gitaly (~> 13.9.0.pre.rc1)
   github-markup (~> 1.7.0)
   gitlab-chronic (~> 0.10.5)
-  gitlab-experiment (~> 0.4.12)
+  gitlab-experiment (~> 0.5.0)
   gitlab-fog-azure-rm (~> 1.0.1)
   gitlab-labkit (~> 0.16.0)
   gitlab-license (~> 1.3)