Update dependencies. (#10136)

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

@@ -1,10 +1,14 @@
 language: go
 go_import_path: github.com/pkg/errors
 go:
-  - 1.4.3
-  - 1.5.4
-  - 1.6.2
-  - 1.7.1
+  - 1.4.x
+  - 1.5.x
+  - 1.6.x
+  - 1.7.x
+  - 1.8.x
+  - 1.9.x
+  - 1.10.x
+  - 1.11.x
   - tip
 
 script: