[FLINK-13729][docs] Update website generation dependencies

This seems to come with a much nicer code highlighting.

This closes apache#9442

docs/Gemfile

@@ -21,10 +21,10 @@ source 'https://rubygems.org'
 ruby '>= 2.1.0'
 
 gem 'jekyll', '3.7.2'
-gem 'addressable', '2.4.0'
-gem 'octokit', '~> 4.3.0'
-gem 'therubyracer', '0.12.2'
-gem 'json', '2.0.4'
+gem 'addressable', '2.6.0'
+gem 'octokit', '4.14.0'
+gem 'therubyracer', '0.12.3'
+gem 'json', '2.2.0'
 gem 'jekyll-multiple-languages', '2.0.3'
 gem 'jekyll-paginate', '1.1.0'
 gem 'liquid-c', '4.0.0' # speed-up site generation

docs/Gemfile.lock

@@ -1,22 +1,23 @@
 GEM
  remote: https://rubygems.org/
  specs:
- addressable (2.4.0)
+ addressable (2.6.0)
+ public_suffix (>= 2.0.2, < 4.0)
  colorator (1.1.0)
- concurrent-ruby (1.0.5)
+ concurrent-ruby (1.1.5)
  em-websocket (0.5.1)
  eventmachine (>= 0.12.9)
  http_parser.rb (~> 0.6.0)
- eventmachine (1.2.5)
- faraday (0.9.2)
+ eventmachine (1.2.7)
+ faraday (0.15.4)
  multipart-post (>= 1.2, < 3)
- ffi (1.9.18)
+ ffi (1.11.1)
  forwardable-extended (2.6.0)
  hawkins (2.0.5)
  em-websocket (~> 0.5)
  jekyll (~> 3.1)
  http_parser.rb (0.6.0)
- i18n (0.9.3)
+ i18n (0.9.5)
  concurrent-ruby (~> 1.0)
  jekyll (3.7.2)
  addressable (~> 2.4)
@@ -33,58 +34,59 @@ GEM
  safe_yaml (~> 1.0)
  jekyll-multiple-languages (2.0.3)
  jekyll-paginate (1.1.0)
- jekyll-sass-converter (1.5.1)
+ jekyll-sass-converter (1.5.2)
  sass (~> 3.4)
- jekyll-watch (2.0.0)
+ jekyll-watch (2.2.1)
  listen (~> 3.0)
- json (2.0.4)
- kramdown (1.16.2)
+ json (2.2.0)
+ kramdown (1.17.0)
  libv8 (3.16.14.19)
- liquid (4.0.0)
+ liquid (4.0.3)
  liquid-c (4.0.0)
  liquid (>= 3.0.0)
  listen (3.1.5)
  rb-fsevent (~> 0.9, >= 0.9.4)
  rb-inotify (~> 0.9, >= 0.9.7)
  ruby_dep (~> 1.2)
  mercenary (0.3.6)
- multipart-post (2.0.0)
- octokit (4.3.0)
- sawyer (~> 0.7.0, >= 0.5.3)
- pathutil (0.16.1)
+ multipart-post (2.1.1)
+ octokit (4.14.0)
+ sawyer (~> 0.8.0, >= 0.5.3)
+ pathutil (0.16.2)
  forwardable-extended (~> 2.6)
- rb-fsevent (0.10.2)
- rb-inotify (0.9.10)
- ffi (>= 0.5.0, < 2)
+ public_suffix (3.1.1)
+ rb-fsevent (0.10.3)
+ rb-inotify (0.10.0)
+ ffi (~> 1.0)
  ref (2.0.0)
- rouge (3.1.1)
+ rouge (3.8.0)
  ruby_dep (1.5.0)
- safe_yaml (1.0.4)
- sass (3.5.5)
+ safe_yaml (1.0.5)
+ sass (3.7.4)
  sass-listen (~> 4.0.0)
  sass-listen (4.0.0)
  rb-fsevent (~> 0.9, >= 0.9.4)
  rb-inotify (~> 0.9, >= 0.9.7)
- sawyer (0.7.0)
- addressable (>= 2.3.5, < 2.5)
- faraday (~> 0.8, < 0.10)
- therubyracer (0.12.2)
- libv8 (~> 3.16.14.0)
+ sawyer (0.8.2)
+ addressable (>= 2.3.5)
+ faraday (> 0.8, < 2.0)
+ therubyracer (0.12.3)
+ libv8 (~> 3.16.14.15)
  ref
 
 PLATFORMS
  ruby
 
 DEPENDENCIES
- addressable (= 2.4.0)
+ addressable (= 2.6.0)
  hawkins
  jekyll (= 3.7.2)
  jekyll-multiple-languages (= 2.0.3)
  jekyll-paginate (= 1.1.0)
- json (= 2.0.4)
+ json (= 2.2.0)
  liquid-c (= 4.0.0)
- octokit (~> 4.3.0)
- therubyracer (= 0.12.2)
+ octokit (= 4.14.0)
+ therubyracer (= 0.12.3)
 
 RUBY VERSION
  ruby 2.3.1p112