Update rake requirement from ~> 10.0 to ~> 13.0 (#31)

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] <support@github.com>

Co-authored-by: Ed Lui <33198+erawk@users.noreply.github.com>

Gemfile.lock

@@ -44,7 +44,7 @@ GEM
       pry (~> 0.10)
     public_suffix (4.0.1)
     rainbow (3.0.0)
-    rake (10.5.0)
+    rake (13.0.1)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -83,7 +83,7 @@ DEPENDENCIES
   bundler (~> 2)
   pry (~> 0.12.0)
   pry-byebug (~> 3.7)
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.0)
   rspec_junit_formatter (~> 0.4.1)
   rubocop (~> 0.74.0)

bambora-client.gemspec

@@ -47,7 +47,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'bundler', '~> 2'
   spec.add_development_dependency 'pry', '~> 0.12.0'
   spec.add_development_dependency 'pry-byebug', '~> 3.7'
-  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 'rspec_junit_formatter', '~> 0.4.1'
   spec.add_development_dependency 'rubocop', '~> 0.74.0'