test suite: separate package.lisp file

test/package.lisp

@@ -1,6 +1,6 @@
 (defpackage trivial-gray-streams-test 
-  (:use :cl :trivial-gray-streams)
-  (:shadow :method)
+  (:use :cl #:trivial-gray-streams)
+  (:shadow #:method)
   (:export #:run-tests
            #:failed-test-names))