Update direct dependencies where possible

vendor/go.uber.org/zap/.travis.yml

@@ -0,0 +1,21 @@
+language: go
+sudo: false
+go:
+  - 1.9.x
+  - 1.10.x
+go_import_path: go.uber.org/zap
+env:
+  global:
+    - TEST_TIMEOUT_SCALE=10
+cache:
+  directories:
+    - vendor
+install:
+  - make dependencies
+script:
+  - make lint
+  - make test
+  - make bench
+after_success:
+  - make cover
+  - bash <(curl -s https://codecov.io/bash)