Bump faraday

Gemfile

@@ -180,7 +180,7 @@ gem "acts-as-taggable-on", "6.0.0"
 # URIs and HTTP
 
 gem "addressable",        "2.5.2", require: "addressable/uri"
-gem "faraday",            "0.15.3"
+gem "faraday",            "0.15.4"
 gem "faraday_middleware", "0.12.2"
 gem "faraday-cookie_jar", "0.0.6"
 gem "typhoeus",           "1.3.1"

Gemfile.lock

@@ -217,7 +217,7 @@ GEM
     factory_girl_rails (4.8.0)
       factory_girl (~> 4.8.0)
       railties (>= 3.0.0)
-    faraday (0.15.3)
+    faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     faraday-cookie_jar (0.0.6)
       faraday (>= 0.7.4)
@@ -793,7 +793,7 @@ DEPENDENCIES
   entypo-rails (= 3.0.0)
   eye (= 0.10.0)
   factory_girl_rails (= 4.8.0)
-  faraday (= 0.15.3)
+  faraday (= 0.15.4)
   faraday-cookie_jar (= 0.0.6)
   faraday_middleware (= 0.12.2)
   fixture_builder (= 0.5.2.rc3)