bump gems incompatible with ruby 2.4.1

Gemfile

@@ -38,7 +38,7 @@ gem 'activerecord-session_store', '~> 1.0.0'
 gem 'responders', '~> 2.4'
 
 gem 'coderay', '~> 1.1.0'
-gem 'rubytree', '~> 0.9.7'
+gem 'rubytree', git: 'https://github.com/dr0verride/RubyTree.git', ref: '06f53ee'
 gem 'rdoc', '>= 2.4.2'
 
 gem 'globalize', git: 'https://github.com/globalize/globalize', ref: '38443bcd', require: false
@@ -107,7 +107,7 @@ gem 'rack-attack', '~> 5.0.1'
 gem 'rails-angular-xss', git: 'https://github.com/opf/rails-angular-xss', ref: 'a45267d5'
 
 gem 'gon', '~> 6.1.0'
-gem "syck", '~> 1.0.5', require: false
+gem "syck", '~> 1.3.0', require: false
 
 # catch exceptions and send them to any airbrake compatible backend
 # don't require by default, instead load on-demand when actually configured

Gemfile.lock

@@ -8,6 +8,14 @@ GIT
       activesupport (>= 4.0.0)
       mime-types (>= 1.16)
 
+GIT
+  remote: https://github.com/dr0verride/RubyTree.git
+  revision: 06f53ee78cc2a48377c1bd177d3bc83c1504701c
+  ref: 06f53ee
+  specs:
+    rubytree (0.9.7)
+      json (~> 1.8)
+
 GIT
   remote: https://github.com/finnlabs/rspec-example_disabler.git
   revision: deb9c38e3f4e3688724583ac1ff58e1ae8aba409
@@ -505,9 +513,6 @@ GEM
       i18n
       iso8601
     ruby-progressbar (1.8.1)
-    rubytree (0.9.7)
-      json (~> 1.8)
-      structured_warnings (~> 0.2)
     rubyzip (1.2.1)
     safe_yaml (1.0.4)
     sass (3.5.0.pre.rc.1)
@@ -543,9 +548,8 @@ GEM
       sprockets (>= 3.0.0)
     sqlite3 (1.3.11)
     stringex (2.7.1)
-    structured_warnings (0.2.0)
     svg-graph (2.1.0)
-    syck (1.0.5)
+    syck (1.3.0)
     sys-filesystem (1.1.7)
       ffi
     thin (1.7.0)
@@ -692,7 +696,7 @@ DEPENDENCIES
   rubocop
   ruby-duration (~> 3.2.0)
   ruby-progressbar
-  rubytree (~> 0.9.7)
+  rubytree!
   sass (= 3.5.0.pre.rc.1)
   sass-rails (~> 5.0.6)
   selenium-webdriver (~> 2.53.4)
@@ -703,7 +707,7 @@ DEPENDENCIES
   sqlite3
   stringex (~> 2.7.1)
   svg-graph (~> 2.1.0)
-  syck (~> 1.0.5)
+  syck (~> 1.3.0)
   sys-filesystem (~> 1.1.4)
   thin (~> 1.7.0)
   timecop (~> 0.8.1)