Update go dependencies

vendor/go.opencensus.io/.travis.yml

@@ -1,27 +1,17 @@
 language: go
 
-go:
-  # 1.8 is tested by AppVeyor
-  - 1.11.x
-
 go_import_path: go.opencensus.io
 
-# Don't email me the results of the test runs.
-notifications:
-  email: false
+go:
+  - 1.11.x
+
+env:
+  global:
+    GO111MODULE=on
 
 before_script:
-  - GO_FILES=$(find . -iname '*.go' | grep -v /vendor/)  # All the .go files, excluding vendor/ if any
-  - PKGS=$(go list ./... | grep -v /vendor/)             # All the import paths, excluding vendor/ if any
-  - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh # Install latest dep release
-  - go get github.com/rakyll/embedmd
+  - make install-tools
 
 script:
-  - embedmd -d README.md              # Ensure embedded code is up-to-date
-  - go build ./...                    # Ensure dependency updates don't break build
-  - if [ -n "$(gofmt -s -l $GO_FILES)" ]; then echo "gofmt the following files:"; gofmt -s -l $GO_FILES; exit 1; fi
-  - go vet ./...
-  - go test -v -race $PKGS            # Run all the tests with the race detector enabled
-  - GOARCH=386 go test -v $PKGS       # Run all tests against a 386 architecture
-  - 'if [[ $TRAVIS_GO_VERSION = 1.8* ]]; then ! golint ./... | grep -vE "(_mock|_string|\.pb)\.go:"; fi'
-  - go run internal/check/version.go
+  - make travis-ci
+  - go run internal/check/version.go # TODO move this to makefile