Update gem versions

.gitignore

@@ -1,3 +1,7 @@
 _site
 .sass-cache
 .jekyll-metadata
+/Gemfile.lock
+/.bundle/
+/.idea/
+/vendor/bundle/

Gemfile

@@ -8,20 +8,21 @@ source "https://rubygems.org"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "jekyll", "~> 3.8.5"
-gem "json", "~> 2.6.0"
-gem "webrick", "~> 1.7.0"
-gem "bigdecimal", "~> 3.1.0"
+gem 'jekyll','3.10.0'
+gem "json",'2.6.3'
+gem "webrick"
+gem "bigdecimal",'3.1.6'
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
-gem "minima", "~> 2.0"
+gem "minima",'2.5.1'
+gem "kramdown-parser-gfm",'1.1.0'
 
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
 # gem "github-pages", group: :jekyll_plugins
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
-  gem "jekyll-feed", "~> 0.6"
+  gem "jekyll-feed",'0.15.1'
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem