Lots of unchecked warnings coming from the dependency analyzer

[sjoerdvisscher]

I'm seeing a lot of these warnings in the bazel build output:

INFO: From scala @io_bazel_rules_scala//third_party/dependency_analyzer/src/main:scala_version:
external/io_bazel_rules_scala/third_party/dependency_analyzer/src/main/io/bazel/rulesscala/dependencyanalyzer/ScalaVersion.scala:68: warning: abstract type pattern c.universe.Literal is unchecked since it is eliminated by erasure
        case u.Literal(u.Constant(s: String)) =>
                      ^

How can I hide these warnings?

[liucijus]

cc @Jamie5

[ittaiz]

@sjoerdvisscher I'm closing thanks to your comment on the PR that it fixes for you. If there is a problem feel free to reopen