emacs/plugin: require older cl library on older emacs

Fix for CI.

Signed-off-by: wagner riffel <[email protected]>

Author: wgrr

plugin/emacs/quicklintjs.el

@@ -5,7 +5,9 @@
 
 ;;; Code:
 
-(require 'cl-seq)
+(if (and (< emacs-major-version 26))
+    (require 'cl)
+  (require 'cl-seq))
 
 (defgroup quicklintjs nil
   "quick-lint-js finds bugs in JavaScript programs."