Remove explicit bundler version

Causes an error on old versions, for example: https://travis-ci.org/github/leesharma/rescuetime/jobs/698075386
leesharma · Jun 13, 2020 · e8a3b94 · e8a3b94
1 parent 0bdad9b
commit e8a3b94
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/rescuetime.gemspec b/rescuetime.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.0.0', '< 2.6'
 
-  spec.add_development_dependency 'bundler', '~> 1.17.3'
+  spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'rake', '>= 12.3.3'
 
   spec.add_development_dependency 'rspec', '~> 3.2', '>= 3.2.0'