feat: add outdated=dependencies command

Author: zdm

lib/package.js

@@ -855,7 +855,29 @@ export default class Package {
                 const mutex = MUTEX_SET.get( "outdated-dependencies/" + dependency.name );
 
                 if ( mutex.tryLock() ) {
-                    res = await this.npm.getPackageVersions( dependency.name );
+                    if ( dependency.gitRepositorySlug ) {
+                        res = await this.git.exec( [ "ls-remote", "--tags", `https://github.com/${ dependency.gitRepositorySlug }` ] );
+
+                        if ( res.ok ) {
+                            const versions = [];
+
+                            for ( const line of res.data.split( "\n" ) ) {
+                                const fields = line.split( "\t" ),
+                                    tag = fields[ 1 ]?.replace( "refs/tags/", "" );
+
+                                if ( !tag || tag.endsWith( "^{}" ) ) continue;
+
+                                if ( SemanticVersion.isValid( tag ) ) {
+                                    versions.push( tag );
+                                }
+                            }
+
+                            res.data = versions;
+                        }
+                    }
+                    else {
+                        res = await this.npm.getPackageVersions( dependency.name );
+                    }
 
                     if ( res.ok ) {
                         let latest, next;