Update Gemfile

Author: kjysmu

Gemfile

@@ -1,18 +1,4 @@
-source "https://rubygems.org"
+source 'https://rubygems.org'
 
-gem "github-pages", group: :jekyll_plugins
-gem "jekyll", "~> 4.2"
-
-# Use sassc instead of sass-embedded
-gem "sassc", "~> 2.4"
-
-group :jekyll_plugins do
-  gem "jekyll-feed"
-  gem "jekyll-sitemap"  
-  gem "jekyll-seo-tag"
-  gem "jekyll-scholar"
-end
-
-# Windows and JRuby does not include zoneinfo files
-gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
-gem "wdm", "~> 0.1.1", platforms: [:mingw, :mswin, :x64_mingw, :mswin64]
+gem "jekyll", ">= 3.6.3"
+gem "jekyll-scholar"