DEV: update dependencies

DEV: update dependencies

diff --git a/mini_sql.gemspec b/mini_sql.gemspec
index 51f5e00..bd0f8ed 100644
--- a/mini_sql.gemspec
+++ b/mini_sql.gemspec
@@ -22,10 +22,10 @@ Gem::Specification.new do |spec|
   end
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "bundler", "~> 1.16"
+  spec.add_development_dependency "bundler", "> 1.16"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "minitest", "~> 5.0"
-  spec.add_development_dependency "pg", "~> 1.0.0"
+  spec.add_development_dependency "pg", "> 1"
   spec.add_development_dependency "guard", "~> 2.14"
   spec.add_development_dependency "guard-minitest", "~> 2.4"
   spec.add_development_dependency "activesupport", "~> 5.2"

GitHub sha: 59dd78a6