deps.edn manager can't parse dependency with $ in it

[danielcompton]

How are you running Renovate?

Self-hosted Renovate

Which platform you running Renovate on?

GitHub.com

Which version of Renovate are you using?

42.74.6

Please tell us more about your question or problem

I have a deps.edn file which includes this dependency io.netty/netty-transport-native-epoll$linux-aarch_64 {:mvn/version "4.2.3.Final"}

e.g.

{:deps {io.netty/netty-transport-native-epoll$linux-aarch_64 {:mvn/version "4.2.3.Final"}}}

When I run renovate, I get a warning:

"Failed to look up clojure package linux-aarch_64:linux-aarch_64"

Logs (if relevant)

Logs

 WARN: Package lookup failures (repository=WhimsicalCode/whimsical, branch=renovate/reagent-reagent-1.x)
       "warnings": [
         "Failed to look up clojure package linux-aarch_64:linux-aarch_64"
       ],
       "files": ["deps.edn"]