Merge pull request #19 from jrasell/f_travis_1.9.x

Update Travis to build using all minor versions of 1.9.

.travis.yml

@@ -2,7 +2,7 @@ sudo: false
 dist: trusty
 language: go
 go:
-- 1.9
+- 1.9.x
 install:
 - go get github.com/golang/lint/golint
 - go get github.com/mitchellh/gox
@@ -14,7 +14,7 @@ notifications:
   email: true
 deploy:
   provider: releases
-  go: 1.9
+  go: 1.9.x
   api_key:
     secure: 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
   file: