Function normalizeTag

normalizeTag(tag: string): undefined | string
Converts a GitHub release tag into a plain semver string, stripping a leading v/V. Returns undefined for anything semver can't parse, so callers never hand an invalid version to semver.gt (which throws).
Parameters
- tag: string
  The raw tag_name from a GitHub release.
Returns undefined | string
The normalized version, or undefined if the tag isn't valid semver.
Example
```
normalizeTag("v1.3.0");     // "1.3.0"
normalizeTag("1.3.0");      // "1.3.0"
normalizeTag("2024-05");    // undefined
```
Source
export function normalizeTag(tag: string): string | undefined { return semver.valid(tag.replace(/^[vV]/, '')) ?? undefined; }
- Defined in src/helpers/updates.ts:194