refactor: update status command to get branches previous release in parallel

Author: zdm

lib/commands/status.js

@@ -183,13 +183,15 @@ Clone wiki:              ${ ansi.hl( upstream.wikiSshCloneUrl ) }
                 } ) ) );
 
         for ( const branchName of Object.keys( status.branchStatus ).sort( pkg.git.compareBranches ) ) {
-            const previousRelease = status.branchStatus[ branchName ].previousRelease;
+            const res = status.branchStatus[ branchName ].previousRelease;
+            if ( !res.ok ) throw res;
+            const previousRelease = res.data;
 
             table.write( {
                 branchName,
                 "syncStatus": status.branchStatus[ branchName ],
-                "previousRelease": previousRelease.data,
-                "unreleasedCommits": previousRelease.data,
+                "previousRelease": previousRelease,
+                "unreleasedCommits": previousRelease,
             } );
         }