Update rake requirement from ~> 10.0 to ~> 13.0

Updates the requirements on [rake](https://github.com/ruby/rake) to permit the latest version.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@v10.5.0...v13.0.1)

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -24,7 +24,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     rainbow (3.0.0)
-    rake (10.5.0)
+    rake (13.0.1)
     reverse_markdown (1.3.0)
       nokogiri
     rmagick (4.0.0)
@@ -73,7 +73,7 @@ DEPENDENCIES
   bundler (~> 2.0)
   pixel_matcher!
   pry (~> 0.12.2)
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.0)
   solargraph
 

pixel_matcher.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "rmagick", "~> 4.0"
   spec.add_development_dependency "bundler", "~> 2.0"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency 'pry', '~> 0.12.2'
   spec.add_development_dependency "solargraph"