feat: add support for lts alias

README.md

@@ -21,7 +21,7 @@ See [action.yml](action.yml)
 - uses: actions/setup-node@v4
   with:
     # Version Spec of the version to use in SemVer notation.
-    # It also admits such aliases as lts/*, latest, nightly and canary builds
+    # It also admits such aliases as lts, lts/*, latest, nightly and canary builds
     # Examples: 12.x, 10.15.1, >=10.15.0, lts/Hydrogen, 16-nightly, latest, node
     node-version: ''
 
@@ -105,7 +105,7 @@ Examples:
 
  - Major versions: `18`, `20`
  - More specific versions: `10.15`, `16.15.1` , `18.4.0`
- - NVM LTS syntax: `lts/erbium`, `lts/fermium`, `lts/*`, `lts/-n`
+ - NVM LTS syntax: `lts`, `lts/erbium`, `lts/fermium`, `lts/*`, `lts/-n`
  - Latest release: `*` or `latest`/`current`/`node`
 
 **Note:** Like the other values, `*` will get the latest [locally-cached Node.js version](https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md#nodejs), or the latest version from [actions/node-versions](https://github.com/actions/node-versions/blob/main/versions-manifest.json), depending on the [`check-latest`](docs/advanced-usage.md#check-latest-version) input.

src/distributions/official_builds/official_builds.ts

@@ -195,6 +195,8 @@ export default class OfficialBuilds extends BaseDistribution {
     stable: boolean,
     manifest: INodeRelease[]
   ): string {
+    if ( versionSpec === "lts" ) versionSpec = "lts/*";
+
     const alias = versionSpec.split('lts/')[1]?.toLowerCase();
 
     if (!alias) {