unsplash.gemspec in unsplash-1.5.6 vs unsplash.gemspec in unsplash-2.0.0

@@ -16,18 +16,19 @@
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = ">= 2.0.0"
+  spec.required_ruby_version = ">= 2.3.0"
 
-  spec.add_dependency "httparty", "~> 0.14.0"
+  spec.add_dependency "httparty", "~> 0.16.4"
   spec.add_dependency "oauth2",   "~> 1"
 
-  # spec.add_development_dependency "bundler", "~> 1.10"
-  spec.add_development_dependency "rake",    "~> 12.0"
-  spec.add_development_dependency "rspec",   "~> 3.5.0"
+  spec.add_development_dependency "rake",    "~> 12.3.2"
+  spec.add_development_dependency "rspec",   "~> 3.8.0"
   spec.add_development_dependency "vcr",     "~> 3.0.0"
-  spec.add_development_dependency "webmock", "~> 2.3.0"
+  spec.add_development_dependency "webmock", "~> 3.5.1"
   spec.add_development_dependency "pry"
-  spec.add_development_dependency "coveralls", '~> 0.8.17'
+  spec.add_development_dependency "coveralls"
+  spec.add_development_dependency "dotenv"
+  spec.add_development_dependency "rb-readline"
 end