how do I make github use dart sass?

Author: CalebLarsen

Gemfile

@@ -1,35 +1,14 @@
 source "https://rubygems.org"
-# Hello! This is where you manage which Jekyll version is used to run.
-# When you want to use a different version, change it below, save the
-# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
-#
-#     bundle exec jekyll serve
-#
-# This will help ensure the proper Jekyll version is running.
-# Happy Jekylling!
 gem "jekyll", "~> 4.4.1"
-# This is the default theme for new Jekyll sites. You may change this to anything you like.
-gem "minima", "~> 2.5"
-# 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!
-gem "jekyll-theme-hacker"
+# gem "jekyll-theme-hacker"
 group :jekyll_plugins do
   gem "jekyll-feed", "~> 0.12"
-  # gem "jekyll-remote-theme"
 end
 
-# 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", "< 3"
   gem "tzinfo-data"
 end
-
-# Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1", :platforms => [:mingw, :x64_mingw, :mswin]
-
-# Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
-# do not have a Java counterpart.
 gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]

Gemfile.lock

@@ -77,11 +77,6 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-sass-converter (3.1.0)
       sass-embedded (~> 1.75)
-    jekyll-seo-tag (2.8.0)
-      jekyll (>= 3.8, < 5.0)
-    jekyll-theme-hacker (0.2.0)
-      jekyll (> 3.5, < 5.0)
-      jekyll-seo-tag (~> 2.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
     json (2.15.0)
@@ -94,10 +89,6 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    minima (2.5.1)
-      jekyll (>= 3.5, < 5.0)
-      jekyll-feed (~> 0.9)
-      jekyll-seo-tag (~> 2.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (5.1.1)
@@ -169,8 +160,6 @@ DEPENDENCIES
   http_parser.rb (~> 0.6.0)
   jekyll (~> 4.4.1)
   jekyll-feed (~> 0.12)
-  jekyll-theme-hacker
-  minima (~> 2.5)
   tzinfo (>= 1, < 3)
   tzinfo-data
   wdm (~> 0.1)

_config.yml

@@ -3,7 +3,7 @@ title: Caleb Larsen's Site
 description: >- # this means to ignore newlines until "baseurl:"
   A home for my projects and thoughts
 baseurl: "/" # the subpath of your site, e.g. /blog
-url: "https://caleblarsen.github.io" # the base hostname & protocol for your site, e.g. http://example.com
+url: "https://caleblarsen.github.io"
 github_username:  CalebLarsen
 
 # Build settings