ALESymbolSearch is searching outside of working directory

The [Deno guide](https://docs.deno.com/runtime/getting_started/setup_your_environment/#ale) says **_ALE supports Deno via the Deno language server out of the box and in many uses cases doesn't require additional configuration_**

When I run `:ALESymbolSearch `, instead of looking in my working directory, it looks in my entire operating system.

In this line of ALE docs: https://github.com/dense-analysis/ale/blob/master/doc/ale-typescript.txt#L81

It says that ALE tries finding a `tsconfig.json` file, however, deno has its own file called `deno.json`, so I think it doesn't work because I doesn't find this `deno.json` since it is trying to find a non existing file called `tsconfig.json`

deno.json: https://docs.deno.com/runtime/fundamentals/configuration/

Aside from this problem ALE is good, I need help please. It's all updated to latest. Both nvim and ALE.