Update go dependencies

vendor/github.com/gogo/protobuf/.travis.yml

@@ -1,3 +1,6 @@
+apt:
+  update: true
+
 env:
   - PROTOBUF_VERSION=2.6.1
   - PROTOBUF_VERSION=3.0.2
@@ -10,11 +13,10 @@ before_install:
 script:
   - PATH=/home/travis/bin:$PATH make buildserverall
   - echo $TRAVIS_GO_VERSION
-  - if [[ "$PROTOBUF_VERSION" == "3.5.1" ]] && [[ "$TRAVIS_GO_VERSION" =~ ^1\.9\.[0-9]+$ ]]; then ! git status --porcelain | read || (git status; git diff; exit 1); fi
+  - if [[ "$PROTOBUF_VERSION" == "3.5.1" ]] && [[ "$TRAVIS_GO_VERSION" == "1.10.x" ]]; then ! git status --porcelain | read || (git status; git diff; exit 1); fi
 
 language: go
 
 go:
-  - 1.8.x
   - 1.9.x
-  - 1.10beta1
+  - 1.10.x