Upgrade thin to 1.8.0

Gemfile

@@ -345,7 +345,7 @@ group :development do
   gem 'better_errors', '~> 2.7.1'
   # thin instead webrick
-  gem 'thin', '~> 1.7.0'
+  gem 'thin', '~> 1.8.0'
 end
 group :development, :test do

Gemfile.lock

@@ -207,7 +207,7 @@ GEM
       git
     css_parser (1.7.0)
       addressable
-    daemons (1.2.6)
+    daemons (1.3.1)
     danger (8.0.6)
       claide (~> 1.0)
       claide-plugins (>= 0.9.2)
@@ -1180,7 +1180,7 @@ GEM
       execjs (>= 0.3.0, < 3)
     test-prof (0.12.0)
     text (1.3.1)
-    thin (1.7.2)
+    thin (1.8.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
@@ -1534,7 +1534,7 @@ DEPENDENCIES
   sys-filesystem (~> 1.1.6)
   terser (= 1.0.2)
   test-prof (~> 0.12.0)
-  thin (~> 1.7.0)
+  thin (~> 1.8.0)
   timecop (~> 0.9.1)
   toml-rb (~> 1.0.0)
   truncato (~> 0.7.11)