DE-68: client option for proxy (#232)

* mailgun 1.2.4 (#229)

* DE-73: default content-type (#216)

* DE-73: default content-type

* DE-73: refactor

* DE-62: reset recipient_variables (#218)

* DE-64: set single track opens-clicks (#219)

* DE-67: accept frozen mailgun options to message body (#221)

* DE-71: fix parse addres when full_name is nil (#222)

* update gem version

* fixes batch add unsubscribes and adds test (#187)

* update version to 1.2.3

* DE-56: ignore mime-version header (#225)

* DE-53: allow string values in custom variables (#226)

* DE-86: update mailgun rails load (#227)

* DE-81: fail if domain is missing (#228)

* update version to 1.2.4

Co-authored-by: Lukas Barry <LukasBBarry@gmail.com>

* DE-68: client option for proxy

* DE-68: fix proxy_url

Co-authored-by: Lukas Barry <LukasBBarry@gmail.com>

lib/mailgun/client.rb

@@ -15,7 +15,8 @@ def initialize(api_key = Mailgun.api_key,
                    api_version = 'v3',
                    ssl = true,
                    test_mode = false,
-                   timeout = nil)
+                   timeout = nil,
+                   proxy_url = nil)
 
       rest_client_params = {
         user: 'api',
@@ -25,6 +26,7 @@ def initialize(api_key = Mailgun.api_key,
       rest_client_params[:timeout] = timeout if timeout
 
       endpoint = endpoint_generator(api_host, api_version, ssl)
+      RestClient.proxy = proxy_url
       @http_client = RestClient::Resource.new(endpoint, rest_client_params)
       @test_mode = test_mode
     end