up deploys go project with nodejs 8.10 runtime

I created a `main.go` file and ran `up`. This prompted me to create an `up.json` file and deploy the server I wrote.

This yielded:

```
{
"name": "recipe-api",
"profile": "default",
"regions": [
"us-east-1"
]
}
```
I checked the runtime for the lambda function it deployed and it was `Node.js 8.10`

When running in verbose mode I get: `DEBU inferred runtime type=go