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...v13.0.3)

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -1015,7 +1015,7 @@ GEM
       method_source (~> 1.0)
     public_suffix (4.0.6)
     rainbow (3.0.0)
-    rake (10.5.0)
+    rake (13.0.3)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -1059,7 +1059,7 @@ DEPENDENCIES
   guard
   guard-minitest
   minitest (~> 5.8)
-  rake (~> 10.0)
+  rake (~> 13.0)
   rubocop (~> 0.34)
   rubyzip (~> 1.1)
   simplecov (~> 0.10)

elasticsearch-drain.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler', '~> 2.1'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rake', '~> 13.0'
 
   spec.add_dependency 'elasticsearch', '~> 7'
   spec.add_dependency 'aws-sdk', '~> 3'