chore(internal/gapicgen): upgrade gapic generator to v0.16.0
This most notably will start passing a new internaloption in all
apis to enable them to authenticate with self-signed JWTs if
applicable.
@@ -33,7 +33,7 @@ RUN GO111MODULE=on go get \
golang.org/x/lint/golint@latest \
golang.org/x/tools/cmd/goimports@latest \
honnef.co/go/tools/cmd/staticcheck@latest \
- github.com/googleapis/gapic-generator-go/cmd/protoc-gen-go_gapic@v0.15.3
+ github.com/googleapis/gapic-generator-go/cmd/protoc-gen-go_gapic@v0.16.0
ENV PATH="${PATH}:/root/go/bin"
# Source: http://debuggable.com/posts/disable-strict-host-checking-for-git-clone:49896ff3-0ac0-4263-9703-1eae4834cda3
