Upgrading server dependancies (#8154)

vendor/github.com/pkg/errors/.travis.yml

@@ -1,12 +1,10 @@
 language: go
 go_import_path: github.com/pkg/errors
 go:
-  - 1.4.x
-  - 1.5.x
-  - 1.6.x
-  - 1.7.x
-  - 1.8.x
-  - 1.9.x
+  - 1.4.3
+  - 1.5.4
+  - 1.6.2
+  - 1.7.1
   - tip
 
 script: