Move stretchr/testify to an explicit test dependency with corrected version number
diff --git a/glide.yaml b/glide.yaml
index 7aef8c0..5442728 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -7,6 +7,8 @@
 
 - package: github.com/xeipuuv/gojsonreference
 
-- package: github.com/stretchr/testify/assert
-  version: ^1.1.3
-
+testImport:
+- package: github.com/stretchr/testify
+  version: ^v1.1.3
+  subpackages:
+  - assert