Update go dependencies

vendor/github.com/grpc-ecosystem/grpc-gateway/ISSUE_TEMPLATE.md

@@ -0,0 +1,66 @@
+# The gRPC-Gateway project is maintained by volunteers in their spare time. Please follow these troubleshooting steps before submitting an issue.
+
+- [ ] Check if your issue has already been reported (https://github.com/grpc-ecosystem/grpc-gateway/issues).
+- [ ] Update your protoc to the [latest version](https://github.com/google/protobuf/releases).
+- [ ] Update your copy of the `grpc-gateway` library to the latest version from github:
+  ```sh
+  go get -u github.com/grpc-ecosystem/grpc-gateway
+  ```
+- [ ] Delete the `protoc-gen-grpc-gateway` and `protoc-gen-swagger` binary from your `PATH`,
+  and reinstall the latest versions:
+  ```sh
+  go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
+  go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger
+  ```
+  
+## I still have a problem!
+ 
+Please consider reaching out for help on a chat forum, such as
+[Gophers Slack](https://invite.slack.golangbridge.org/) (channel #grpc-gateway).
+It's much easier to help with common debugging steps in a chat, and some of
+the maintainers are reading the channel regularly. If you
+submit an issue which is clearly an environment setup problem, or it's obvious
+you haven't tried seeking help somewhere else first, we may close your issue.
+ 
+## I still have a problem!
+
+Please follow these steps to submit a bug report:
+
+### Bug reports:
+
+Fill in the following sections with explanations of what's gone wrong.
+
+### Steps you follow to reproduce the error:
+
+```html
+<!-- Example steps
+1.  I grab my catapult
+2.  I load it with lettuce
+3.  Press the fire button
+4.  It falls over
+-->
+```
+
+Your steps here.
+
+### What did you expect to happen instead:
+
+```html
+<!-- Example answer
+1.  It would have rained lettuce from the sky bringing forth a cuddly army of bunnies we could
+    play with
+-->
+```
+
+Your answer here.
+
+### What's your theory on why it isn't working:
+
+```html
+<!-- Example answer
+Evil wizards are hoarding the bunnies and don't want to share. The wizards are casting 
+lettuce protection spells so the cattapult won't work.
+-->
+```
+
+Your theory here.