fix(helm): search command returns error on index search failures (specifically on regular expression errors)

Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

cmd/helm/search.go

@@ -83,7 +83,7 @@ func (s *searchCmd) run(args []string) error {
 		q := strings.Join(args, " ")
 		res, err = index.Search(q, searchMaxScore, s.regexp)
 		if err != nil {
-			return nil
+			return err
 		}
 	}