Merge pull request #519 from spring-cloud/adrian.feign-bump

Bumps to Feign 8.8.1

pom.xml

@@ -26,7 +26,7 @@
 		<main.basedir>${basedir}</main.basedir>
 		<archaius.version>0.6.5</archaius.version>
 		<eureka.version>1.2.0</eureka.version>
-		<feign.version>8.7.1</feign.version>
+		<feign.version>8.8.1</feign.version>
 		<hystrix.version>1.4.13</hystrix.version>
 		<ribbon.version>2.1.0</ribbon.version>
 		<zuul.version>1.0.28</zuul.version>