fix hard dependency on Faraday ~> 0.9.x

Author: romikoops

zendesk_api.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
  s.required_ruby_version = ">= 2.3"
  s.required_rubygems_version = ">= 1.3.6"
 
- s.add_runtime_dependency "faraday", "~> 0.9"
+ s.add_runtime_dependency "faraday", ">= 0.9.0", "< 1.0.0"
  s.add_runtime_dependency "hashie", ">= 3.5.2", "< 4.0.0"
  s.add_runtime_dependency "inflection"
  s.add_runtime_dependency "multipart-post", "~> 2.0"