Ignore unstable version in outdated dependency logic

[idleberg]

Description

In the list of dependencies, a gap in major versions is indicated with red colour and a warning symbol. This is a useful feature, but IMHO it should not check against unstable versions.

Example

c12 latest stable version: v3.3.3
c12 latest version: 4.0.0-beta.2

However

What's problematic is that version 4.0.0-beta.2 uses the default dist-tag latest, so one might argue that the problem is on the developer side.

Still, I wanted to bring it up and propose a fix. You can decide how to deal with it.