bundler version 2.4.2

Author: 陈刑

.github/workflows/jekyll.yml

@@ -121,14 +121,11 @@ jobs:
       run: |
         if [ ! -e $PREFIX/bin/bundle ]; then
           export PATH="$PREFIX/bin:$PATH"
-          gem install bundler -v '~> 1' $NO_DOCUMENT
+          gem install bundler -v 2.4.2 $NO_DOCUMENT
         fi
 
     - run: echo "$PREFIX/bin" >> $GITHUB_PATH
     - run: ruby --version
-    - run: ruby -ropen-uri -e 'puts URI.send(:open, %{https://rubygems.org/}) { |f| f.read(1024) }'
-    - name: Install JSON gem
-      run: gem install json -v '2.2.0' $NO_DOCUMENT
     - run: bundle --version
     - run: bundle install    
     - name: Setup Pages