Update mrkt to 0.8.0

Gemfile

 source 'https://rubygems.org'
 
 gem 'dotenv',             '~> 2.0.2'
-gem 'mrkt',               '~> 0.6.0'
+gem 'mrkt',               '~> 0.8.0'
 gem 'full-name-splitter', '~> 0.1.2'
 gem 'oj',                 '~> 2.17'
 gem 'sentry-raven',       '~> 2.7.0'

Gemfile.lock

@@ -2,14 +2,15 @@ GEM
   remote: https://rubygems.org/
   specs:
     dotenv (2.0.2)
-    faraday (0.9.2)
+    faraday (0.13.1)
       multipart-post (>= 1.2, < 3)
-    faraday_middleware (0.9.2)
-      faraday (>= 0.7.4, < 0.10)
+    faraday_middleware (0.12.2)
+      faraday (>= 0.7.4, < 1.0)
     full-name-splitter (0.1.2)
     kgio (2.10.0)
-    mrkt (0.6.1)
-      faraday_middleware (~> 0.9.1)
+    mrkt (0.8.0)
+      faraday (> 0.9.0, < 0.14.0)
+      faraday_middleware (> 0.9.0, < 0.13.0)
     multipart-post (2.0.0)
     oj (2.17.5)
     rack (1.6.4)
@@ -34,7 +35,7 @@ PLATFORMS
 DEPENDENCIES
   dotenv (~> 2.0.2)
   full-name-splitter (~> 0.1.2)
-  mrkt (~> 0.6.0)
+  mrkt (~> 0.8.0)
   oj (~> 2.17)
   sentry-raven (~> 2.7.0)
   sinatra (~> 1.4.6)