For the moment we need to set the versioning to e.g. 'loose' to allow using 4 digits semver.
Working example:
{
"$schema": "https://docs.renovatebot.com/renovate-schema.json",
"extends": ["github>whitesource/merge-confidence:beta", "config:base"],
"pre-commit": {
"enabled": true
},
"packageRules": [
{
"matchPackageNames": ["maxwinterstein/shfmt-py"],
"versioning": "loose"
}
]
}