Update go dependencies

vendor/github.com/census-instrumentation/opencensus-proto/.travis.yml

@@ -0,0 +1,49 @@
+sudo: required
+dist: trusty
+
+matrix:
+  include:
+  - language: java
+    jdk: oraclejdk8
+    env: BUILD=BAZEL
+
+  - language: java
+    jdk: oraclejdk8
+    env: BUILD=GRADLE
+
+before_install:
+  - case "$BUILD" in
+      "BAZEL")
+        echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list ;
+        curl https://storage.googleapis.com/bazel-apt/doc/apt-key.pub.gpg | sudo apt-key add - ;
+        sudo apt-get update ;;
+    esac
+
+install:
+  - case "$BUILD" in
+      "BAZEL")
+        sudo apt-get install bazel ;
+        bazel version;;
+    esac
+
+script:
+  - case "$BUILD" in
+      "BAZEL")
+        cd src;
+        bazel build --show_result=100 ... ;;
+      "GRADLE")
+        ./gradlew clean assemble --stacktrace ;
+        ./gradlew check --stacktrace ;;
+      *)
+        echo "Missing case $BUILD" ;
+        exit 1 ;;
+    esac
+
+before_cache:
+  - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
+
+cache:
+  directories:
+    - $HOME/.gradle
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/