Bump thin from 1.8.2 to 2.0.1

Bumps [thin](https://github.com/macournoyer/thin) from 1.8.2 to 2.0.1.
- [Release notes](https://github.com/macournoyer/thin/releases)
- [Changelog](https://github.com/macournoyer/thin/blob/master/CHANGELOG)
- [Commits](https://github.com/macournoyer/thin/compare/v1.8.2...v2.0.1)

---
updated-dependencies:
- dependency-name: thin
  dependency-version: 2.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -8,7 +8,7 @@ gem 'net-smtp', require: false
 gem 'json'
 
 gem 'eventmachine', '~> 1.2', '>= 1.2.7'
-gem 'thin', '~> 1.8'
+gem 'thin', '~> 2.0'
 gem 'sinatra', '~> 3.2'
 gem 'rack', '~> 2.2'
 gem 'rack-protection', '~> 3.2.0'

Gemfile.lock

@@ -251,10 +251,11 @@ GEM
       test-unit (>= 2.5.2)
     test-unit-runner-tap (1.1.2)
       test-unit
-    thin (1.8.2)
+    thin (2.0.1)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
-      rack (>= 1, < 3)
+      logger
+      rack (>= 1, < 4)
     tilt (2.6.1)
     timeout (0.4.3)
     timers (4.4.0)
@@ -327,7 +328,7 @@ DEPENDENCIES
   sqlite3 (~> 2.7)
   term-ansicolor
   test-unit-full (~> 0.0.5)
-  thin (~> 1.8)
+  thin (~> 2.0)
   uglifier (~> 4.2)
   websocket-client-simple (~> 0.6.1)
   xmlrpc (~> 0.3.3)