Update rake requirement from ~> 10.4 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

@@ -129,7 +129,7 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.20.3, < 2.0)
     rainbow (3.0.0)
-    rake (10.5.0)
+    rake (13.0.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -210,7 +210,7 @@ DEPENDENCIES
   pry-nav (~> 0.2.4)
   rack (~> 2.1.2)
   rack-test (~> 0.6)
-  rake (~> 10.4)
+  rake (~> 13.0)
   rspec (~> 3.1, >= 3.1.0)
   rubocop
   rubocop-rails

auth0.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency 'rest-client', '~> 2.0.0'
 
-  s.add_development_dependency 'rake', '~> 10.4'
+  s.add_development_dependency 'rake', '~> 13.0'
   s.add_development_dependency 'fuubar', '~> 2.0'
   s.add_development_dependency 'guard-rspec', '~> 4.5' unless ENV['CIRCLECI']
   s.add_development_dependency 'dotenv-rails', '~> 2.0'