yarn resolution warnings

yarn run setup currently reports various warnings in the resolution step.
They can be grouped in the following categories:

1. missing peerDependencies (YN0002) in digitransit-ui or digitransit-ui-components
2. missing peerDependencies (YN0002) in hsl components
3. missing peerDependencies (YN0002) in third party components
4. not-satisfying versions provided (YN0060)

I suggest the following actions to resolve these warnings:

1. fix declared peerDependencies in digitransit-ui or digitransit-ui-components
2. fix declared peerDependencies in hsl-fi packages and upgrade digitransit-ui to updated versions
3. As temporary fix, add missing peerDependencies as packageExtensions to .yarnrc.yml and mid-term upgrade concerned packages (assuming they are fixed in the meantime, otherwise suggest fixes there)
4. check and correct versions. IMHO most clashes are caused by fixed versions in package.json, where rather ranges should be specified.

Start by running yarn run setup and grouping the reported YN0002 and YN0060 warnings by package. Review the peerDependencies in digitransit-ui, digitransit-ui-components, and hsl-fi packages, along with package.json and .yarnrc.yml. Done means the resolution step no longer reports these warnings, with temporary packageExtensions used only where necessary.