chore: update the gem dependencies to be more future thinking

This change makes it so the gem dependences are more future thinking
and can upgrade past the pessimistic version constraints.

This addresses a security concern with rake as well (fixed in 12.3.3).

The homepage was changed to specify the github repos page

git_evolution.gemspec

@@ -10,18 +10,18 @@ Gem::Specification.new do |spec|
   spec.email         = ['[email protected]']
   spec.summary       = 'Gem that provides the ability to determine the evolution of code within a git repository'
   spec.description   = 'Gem that provides the ability to determine the evolution of code within a git repository'
-  spec.homepage      = ''
+  spec.homepage      = 'https://github.com/kevinjalbert/git_evolution'
   spec.license       = 'MIT'
 
   spec.files         = Dir['**/*']
   spec.test_files    = Dir['{test,spec,features}/**/*']
   spec.executables   = Dir['bin/*'].map { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_dependency 'bundler', '~> 2.0'
-  spec.add_dependency 'rake', '~> 10.0'
-  spec.add_dependency 'rugged', '~> 0.21.0'
-  spec.add_dependency 'chronic', '~> 0.10.0'
+  spec.add_dependency 'bundler', '>= 2.0'
+  spec.add_dependency 'rake', '>= 13.0'
+  spec.add_dependency 'rugged', '>= 0.21.0'
+  spec.add_dependency 'chronic', '>= 0.10.0'
 
-  spec.required_ruby_version = '~> 2.5'
+  spec.required_ruby_version = '>= 2.5'
 end