Update to Ruby 2.4.2

Gemfile

@@ -1,13 +1,14 @@
 source 'http://rubygems.org'
 
-ruby '2.3.0'
+ruby '2.4.2'
 
-gem 'slack-ruby-bot', '~> 0.6.0'
+gem 'slack-ruby-bot', '~> 0.10.5'
 gem 'wolfram'
 gem 'puma'
 gem 'sinatra'
 gem 'mechanize'
 gem 'nokogiri'
+gem 'celluloid-io'
 
 group :development, :test do
   gem 'rake'

Gemfile.lock

@@ -1,110 +1,120 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (4.2.5)
+    activesupport (5.1.4)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
-    diff-lcs (1.2.5)
-    domain_name (0.5.25)
+    celluloid (0.17.3)
+      celluloid-essentials
+      celluloid-extras
+      celluloid-fsm
+      celluloid-pool
+      celluloid-supervision
+      timers (>= 4.1.1)
+    celluloid-essentials (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-extras (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-fsm (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-io (0.17.3)
+      celluloid (>= 0.17.2)
+      nio4r (>= 1.1)
+      timers (>= 4.1.1)
+    celluloid-pool (0.20.5)
+      timers (>= 4.1.1)
+    celluloid-supervision (0.20.6)
+      timers (>= 4.1.1)
+    concurrent-ruby (1.0.5)
+    diff-lcs (1.3)
+    domain_name (0.5.20170404)
       unf (>= 0.0.5, < 1.0.0)
-    eventmachine (1.0.9.1)
-    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-parse_oj (0.3.0)
-      faraday (~> 0.9.0)
-      faraday_middleware (~> 0.9.1)
-      oj (~> 2.0)
-    faye-websocket (0.10.2)
-      eventmachine (>= 0.12.0)
-      websocket-driver (>= 0.5.1)
-    foreman (0.78.0)
+    faraday_middleware (0.12.2)
+      faraday (>= 0.7.4, < 1.0)
+    foreman (0.84.0)
       thor (~> 0.19.1)
-    giphy (2.0.2)
-      faraday (~> 0.9)
-      faraday_middleware (~> 0.9)
-      faraday_middleware-parse_oj (~> 0.3)
-      launchy (~> 2.4)
-    gli (2.13.4)
-    hashie (3.4.3)
-    http-cookie (1.0.2)
+    gli (2.17.1)
+    hashie (3.5.7)
+    hitimes (1.2.6)
+    http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (0.7.0)
-    json (1.8.3)
-    launchy (2.4.3)
-      addressable (~> 2.3)
-    mechanize (2.7.4)
+    i18n (0.9.1)
+      concurrent-ruby (~> 1.0)
+    mechanize (2.7.5)
       domain_name (~> 0.5, >= 0.5.1)
       http-cookie (~> 1.0)
-      mime-types (>= 1.17.2, < 3)
+      mime-types (>= 1.17.2)
       net-http-digest_auth (~> 1.1, >= 1.1.1)
       net-http-persistent (~> 2.5, >= 2.5.2)
       nokogiri (~> 1.6)
       ntlm-http (~> 0.1, >= 0.1.1)
       webrobots (>= 0.0.9, < 0.2)
-    mime-types (2.99)
-    mini_portile (0.6.2)
-    minitest (5.8.3)
+    mime-types (3.1)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0521)
+    mini_portile2 (2.3.0)
+    minitest (5.11.1)
     multipart-post (2.0.0)
-    net-http-digest_auth (1.4)
+    mustermann (1.0.1)
+    net-http-digest_auth (1.4.1)
     net-http-persistent (2.9.4)
-    nokogiri (1.6.6.4)
-      mini_portile (~> 0.6.0)
+    nio4r (2.2.0)
+    nokogiri (1.8.1)
+      mini_portile2 (~> 2.3.0)
     ntlm-http (0.1.1)
-    oj (2.14.3)
-    puma (2.12.2)
-    rack (1.6.4)
-    rack-protection (1.5.3)
+    puma (3.11.0)
+    rack (2.0.3)
+    rack-protection (2.0.0)
       rack
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rake (10.4.2)
-    rspec (3.3.0)
-      rspec-core (~> 3.3.0)
-      rspec-expectations (~> 3.3.0)
-      rspec-mocks (~> 3.3.0)
-    rspec-core (3.3.2)
-      rspec-support (~> 3.3.0)
-    rspec-expectations (3.3.1)
+    rack-test (0.8.2)
+      rack (>= 1.0, < 3)
+    rake (12.3.0)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.1)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.3.0)
-    rspec-mocks (3.3.2)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.3.0)
-    rspec-support (3.3.0)
-    sinatra (1.4.6)
-      rack (~> 1.4)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    slack-ruby-bot (0.6.0)
-      activesupport
-      faye-websocket
-      giphy (~> 2.0.2)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.0)
+    sinatra (2.0.0)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.0)
+      tilt (~> 2.0)
+    slack-ruby-bot (0.10.5)
       hashie
-      slack-ruby-client (>= 0.5.0)
-    slack-ruby-client (0.5.3)
-      faraday
+      slack-ruby-client (>= 0.6.0)
+    slack-ruby-client (0.11.0)
+      activesupport
+      faraday (>= 0.9)
       faraday_middleware
       gli
-      json
+      hashie
       websocket-driver
-    thor (0.19.1)
-    thread_safe (0.3.5)
-    tilt (2.0.1)
-    tzinfo (1.2.2)
+    thor (0.19.4)
+    thread_safe (0.3.6)
+    tilt (2.0.8)
+    timers (4.1.2)
+      hitimes
+    tzinfo (1.2.4)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.1)
+    unf_ext (0.0.7.4)
     webrobots (0.1.2)
-    websocket-driver (0.6.3)
+    websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.2)
+    websocket-extensions (0.1.3)
     wolfram (0.2.1)
       nokogiri (>= 1.4.3)
 
@@ -112,6 +122,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  celluloid-io
   foreman
   mechanize
   nokogiri
@@ -120,8 +131,11 @@ DEPENDENCIES
   rake
   rspec
   sinatra
-  slack-ruby-bot (~> 0.6.0)
+  slack-ruby-bot (~> 0.10.5)
   wolfram
 
+RUBY VERSION
+   ruby 2.4.2p198
+
 BUNDLED WITH
-   1.11.2
+   1.16.1