fix: load faraday-mutipart error (#67)

Author: kyohah

Gemfile

@@ -12,8 +12,6 @@ group :dev do
 end
 
 group :test do
-  gem 'faraday'
-  gem 'faraday-multipart'
   gem 'rack'
   gem 'simplecov'
 end

stream-chat.gemspec

@@ -19,6 +19,7 @@ Gem::Specification.new do |gem|
   gem.required_ruby_version = '>=2.5.0'
 
   gem.add_dependency 'faraday'
+  gem.add_dependency 'faraday-multipart'
   gem.add_dependency 'jwt'
   gem.add_development_dependency 'rake'
   gem.add_development_dependency 'rspec'