downgrade jekyll

Gemfile

@@ -7,21 +7,5 @@ source "https://rubygems.org"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "jekyll", "~> 4.2.0"
+gem "jekyll", "~> 4.0.0"
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
-
-# 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!
-
-# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
-# and associated library.
-platforms :mingw, :x64_mingw, :mswin, :jruby do
-  gem "tzinfo", "~> 1.2"
-  gem "tzinfo-data"
-end
-
-# Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
-

Gemfile.lock

@@ -14,21 +14,21 @@ GEM
     http_parser.rb (0.6.0)
     i18n (1.8.10)
       concurrent-ruby (~> 1.0)
-    jekyll (4.2.0)
+    jekyll (4.0.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (~> 1.0)
+      i18n (>= 0.9.5, < 2)
       jekyll-sass-converter (~> 2.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 2.3)
+      kramdown (~> 2.1)
       kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
-      mercenary (~> 0.4.0)
+      mercenary (~> 0.3.3)
       pathutil (~> 0.9)
       rouge (~> 3.0)
       safe_yaml (~> 1.0)
-      terminal-table (~> 2.0)
+      terminal-table (~> 1.8)
     jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-watch (2.2.1)
@@ -41,7 +41,7 @@ GEM
     listen (3.5.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    mercenary (0.4.0)
+    mercenary (0.3.6)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.6)
@@ -53,7 +53,7 @@ GEM
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
-    terminal-table (2.0.0)
+    terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     unicode-display_width (1.7.0)
 
@@ -62,10 +62,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  jekyll (~> 4.2.0)
-  tzinfo (~> 1.2)
-  tzinfo-data
-  wdm (~> 0.1.1)
+  jekyll (~> 4.0.0)
 
 BUNDLED WITH
    2.2.17