Bump Jekyll to 4.3.3 (#135)

Gemfile

@@ -7,7 +7,7 @@ source "https://gems.ruby-china.com"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "jekyll", "~> 4.2.2"
+gem "jekyll", "~> 4.3.3"
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 gem "minimal-mistakes-jekyll"
 

assets/css/main.scss

@@ -1,10 +0,0 @@
----
-# Only the main Sass file needs front matter (the dashes are enough)
-search: false
----
-
-@charset "utf-8";
-
-$sans-serif: -apple-system, BlinkMacSystemFont, "Roboto", "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
-@import "minimal-mistakes/skins/{{ site.minimal_mistakes_skin | default: 'default' }}"; // skin
-@import "minimal-mistakes"; // main partials