Update dependency bundler to v4

Author: renovate[bot]

Gemfile

@@ -22,6 +22,6 @@ gem 'libv8-node', '16.10.0.0'
 
 group :development do
   # management of this gem
-  gem "bundler", "~> 2.7", ">= 2.7.2"
+  gem "bundler", "~> 4.0", ">= 4.0.11"
   gem "juwelier", "~> 2.4.7"
 end

Gemfile.lock

@@ -221,7 +221,7 @@ PLATFORMS
 DEPENDENCIES
   bibmarkdown (~> 2.0.0)
   bibtex-ruby
-  bundler (~> 2.7, >= 2.7.2)
+  bundler (~> 4.0, >= 4.0.11)
   citeproc-ruby (>= 1.1.6)
   csl-styles
   execjs
@@ -236,4 +236,4 @@ DEPENDENCIES
   sskatex
 
 BUNDLED WITH
-   2.7.2
+   4.0.11