Change dependent pry version

The `pry-inline` doesn't work with `pry` v0.13.0 because of the
`Pry::Config` problem (see: pry/pry#2126).

This commit changes dependent pry version.

pry-inline.gemspec

@@ -18,9 +18,9 @@ Gem::Specification.new do |spec|
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.require_paths = ['lib']
 
-  spec.add_dependency 'pry', '> 0.10.0', '<= 0.13'
+  spec.add_dependency 'pry', '> 0.10.0'
   spec.add_dependency 'unicode', '~> 0.4.4'
-  spec.add_development_dependency 'bundler', '~> 1.10'
+  spec.add_development_dependency 'bundler', '~> 2'
   spec.add_development_dependency 'rake', '~> 12.3'
   spec.add_development_dependency 'simplecov', '~> 0.16.0'
   spec.add_development_dependency 'test-unit', '>= 3.0.0'