Upgrade thin to version 1.7.2

Gemfile

@@ -57,7 +57,7 @@ group :development, :test do
   gem 'rspec-rails', '~> 3.7', '>= 3.7.2'
   gem 'rubocop', '~> 0.51.0', require: false
   gem 'spring', '~> 1.4.0'
-  gem 'thin', '~> 1.6.4'
+  gem 'thin', '~> 1.7.2'
 end
 
 group :test do

Gemfile.lock

@@ -120,7 +120,7 @@ GEM
       thor (~> 0.19.1)
       tins (~> 1.6.0)
     crass (1.0.3)
-    daemons (1.2.3)
+    daemons (1.2.5)
     database_cleaner (1.5.0)
     debug_inspector (0.0.3)
     devise (3.5.10)
@@ -137,7 +137,7 @@ GEM
     domain_name (0.5.20170404)
       unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
-    eventmachine (1.0.8)
+    eventmachine (1.2.5)
     execjs (2.6.0)
     factory_girl (4.5.0)
       activesupport (>= 3.0.0)
@@ -397,10 +397,10 @@ GEM
     sunspot_solr (2.2.7)
     term-ansicolor (1.6.0)
       tins (~> 1.0)
-    thin (1.6.4)
+    thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
-      rack (~> 1.0)
+      rack (>= 1, < 3)
     thor (0.19.4)
     thread_safe (0.3.6)
     tilt (2.0.8)
@@ -500,7 +500,7 @@ DEPENDENCIES
   sunspot-rails-tester (~> 1.0.0)
   sunspot_rails (~> 2.2.0)
   sunspot_solr (~> 2.2.0)
-  thin (~> 1.6.4)
+  thin (~> 1.7.2)
   tinymce-rails (~> 4.2.6)
   tinymce-rails-langs (~> 4.20140129)
   turbolinks (~> 2.5.3)