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@v10.4.2...v13.0.3)

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

Gemfile.lock

@@ -15,7 +15,7 @@ GEM
     diff-lcs (1.3)
     numo-narray (0.9.1.3)
     porter2stemmer (1.0.1)
-    rake (10.4.2)
+    rake (13.0.3)
     rambling-trie (2.0.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
@@ -33,11 +33,12 @@ GEM
     tokenizer (0.3.0)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES
   bundler (~> 1.17)
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.0)
   smalltext!
 

smalltext.gemspec

@@ -43,6 +43,6 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'porter2stemmer'
 
   spec.add_development_dependency "bundler", "~> 1.17"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end