Merge pull request #33 from AlexZhukovich/update-jekyll-to-4.1.1

Migrate to Jekyll 4.1.1

Author: AlexZhukovich

Gemfile

@@ -9,23 +9,22 @@ ruby RUBY_VERSION
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "jekyll", "3.8.5"
+gem "jekyll", "4.1.1"
 
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 # gem "minima", "~> 2.0"
 
 # 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
-gem "github-pages","~> 202" , group: :jekyll_plugins
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
-   gem "jekyll-feed", "~> 0.11.0"
-   gem "jekyll-paginate-v2", "2.0.0"
-   gem 'jekyll-seo-tag'
-   gem 'jekyll-gist'
-   gem 'jekyll-avatar'
+   gem "jekyll-feed", "~> 0.15.1"
+   gem "jekyll-paginate-v2", "3.0.0"
+   gem "jekyll-seo-tag", "2.7.1"
+   gem "jekyll-gist", "1.5.0"
+   gem "jekyll-avatar", "0.7.0"
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem