teach Excon to use #fetch_timeout

lib/faraday/adapter/excon.rb

@@ -90,17 +90,15 @@ module Faraday
       end
 
       def amend_opts_with_timeouts!(opts, req)
-        timeout = req[:timeout]
+        if sec = req.fetch_timeout(:read)
-        return unless timeout
+          opts[:read_timeout] = sec
-
+        end
-        opts[:read_timeout] = timeout
+        if sec = req.fetch_timeout(:write)
-        opts[:connect_timeout] = timeout
+          opts[:write_timeout] = sec
-        opts[:write_timeout] = timeout
+        end
-
+        if sec = req.fetch_timeout(:open)
-        open_timeout = req[:open_timeout]
+          opts[:connect_timeout] = sec
-        return unless open_timeout
+        end
-
-        opts[:connect_timeout] = open_timeout
       end
 
       def amend_opts_with_proxy_settings!(opts, req)

spec/faraday/adapter/excon_spec.rb

@@ -43,7 +43,7 @@ RSpec.describe Faraday::Adapter::Excon do
       options = adapter.send(:opts_from_env, env)
       expect(options[:read_timeout]).to eq(nil)
       expect(options[:write_timeout]).to eq(nil)
-      expect(options[:connect_timeout]).to eq(nil)
+      expect(options[:connect_timeout]).to eq(3)
     end
   end
 end