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

@@ -75,7 +75,7 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.10)
     public_suffix (3.0.3)
-    rake (10.5.0)
+    rake (13.0.1)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -106,7 +106,7 @@ DEPENDENCIES
   mocha (~> 1.8)
   peatio-bitcoincash!
   pry-byebug
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.0)
   webmock (~> 3.5)
 

peatio-bitcoincash.gemspec

@@ -33,7 +33,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler", "~> 1.17"
   spec.add_development_dependency "mocha", "~> 1.8"
   spec.add_development_dependency "pry-byebug"
-  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 "webmock", "~> 3.5"
 end