Bump jeweler from 2.0.1 to 2.3.9

Gemfile

@@ -7,7 +7,7 @@ gemspec
 group :development do
   gem 'bundler', '~> 1.0'
   gem 'byebug'
-  gem 'jeweler', '~> 2.0.1'
+  gem 'jeweler', '~> 2.3.9'
   gem 'minitest', '>= 0'
   gem 'rdoc', '~> 3.12'
   gem 'simplecov', '>= 0'

Gemfile.lock

@@ -26,8 +26,7 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.4.0)
     bigdecimal (1.3.5)
     builder (3.2.3)
     byebug (10.0.2)
@@ -53,55 +52,59 @@ GEM
       i18n
     equatable (0.5.0)
     erubi (1.7.1)
-    faraday (0.12.2)
+    faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.12.2)
       faraday (>= 0.7.4, < 1.0)
-    git (1.4.0)
-    github_api (0.18.2)
-      addressable (~> 2.4)
+    git (1.5.0)
+    github_api (0.16.0)
+      addressable (~> 2.4.0)
       descendants_tracker (~> 0.0.4)
-      faraday (~> 0.8)
-      hashie (~> 3.5, >= 3.5.2)
+      faraday (~> 0.8, < 0.10)
+      hashie (>= 3.4)
+      mime-types (>= 1.16, < 3.0)
       oauth2 (~> 1.0)
-    hashie (3.5.7)
-    highline (2.0.0)
+    hashie (3.6.0)
+    highline (2.0.2)
     homecoming (0.1.1)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jeweler (2.0.1)
+    jeweler (2.3.9)
       builder
-      bundler (>= 1.0)
+      bundler
       git (>= 1.2.5)
-      github_api
+      github_api (~> 0.16.0)
       highline (>= 1.6.15)
       nokogiri (>= 1.5.10)
+      psych
       rake
       rdoc
+      semver2
     json (1.8.6)
-    jwt (1.5.6)
+    jwt (2.2.1)
     loofah (2.2.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     method_source (0.9.0)
+    mime-types (2.99.3)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     multi_json (1.13.1)
     multi_xml (0.6.0)
-    multipart-post (2.0.0)
+    multipart-post (2.1.1)
     necromancer (0.4.0)
-    nokogiri (1.10.3)
+    nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
-    oauth2 (1.4.0)
-      faraday (>= 0.8, < 0.13)
-      jwt (~> 1.0)
+    oauth2 (1.4.1)
+      faraday (>= 0.8, < 0.16.0)
+      jwt (>= 1.0, < 3.0)
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
     pastel (0.7.2)
       equatable (~> 0.5.0)
       tty-color (~> 0.4.0)
-    public_suffix (3.0.2)
+    psych (3.1.0)
     rack (2.0.7)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -110,9 +113,10 @@ GEM
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.0.4)
       loofah (~> 2.2, >= 2.2.2)
-    rake (12.3.1)
+    rake (12.3.3)
     rdoc (3.12.2)
       json (~> 1.4)
+    semver2 (3.4.2)
     simplecov (0.16.1)
       docile (~> 1.1)
       json (>= 1.8, < 3)
@@ -195,7 +199,7 @@ DEPENDENCIES
   dodona-cli!
   dotiw (~> 4.0.0)
   homecoming (~> 0.1.1)
-  jeweler (~> 2.0.1)
+  jeweler (~> 2.3.9)
   minitest
   rdoc (~> 3.12)
   simplecov