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

@@ -50,7 +50,7 @@ GEM
       pry (~> 0.13.0)
     public_suffix (4.0.6)
     rainbow (3.0.0)
-    rake (10.5.0)
+    rake (13.0.3)
     rb-readline (0.5.5)
     regexp_parser (2.1.1)
     rest-client (2.1.0)
@@ -115,7 +115,7 @@ DEPENDENCIES
   dotenv (~> 2.2, >= 2.2.1)
   pry-byebug (~> 3.6, >= 3.6.0)
   pusher-push-notifications!
-  rake (~> 10.0)
+  rake (~> 13.0)
   rb-readline (~> 0)
   rspec (~> 3.0)
   rubocop (>= 0.49.0)

pusher-push-notifications.gemspec

@@ -30,7 +30,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'coveralls', '~> 0.8.21'
   spec.add_development_dependency 'dotenv', '~> 2.2', '>= 2.2.1'
   spec.add_development_dependency 'pry-byebug', '~> 3.6', '>= 3.6.0'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rb-readline', '~> 0'
   spec.add_development_dependency 'rspec', '~> 3.0'
   spec.add_development_dependency 'rubocop', '>= 0.49.0'