Require Emacs 24 in a couple of test projects, else package-lint complains about lexical-binding cookie.

Author: doublep

test/project-c/project-c-pkg.el

@@ -1,4 +1,4 @@
 ;;; -*- no-byte-compile: t -*-
 (define-package "project-c" "1.0"
   "Test project with one dependency and package definition file"
-  '((dependency-a "0")))
+  '((dependency-a "0") (emacs "24.1")))

test/project-c/project-c.el

@@ -1,4 +1,5 @@
 ;; -*- lexical-binding: t -*-
+
 ;;; Copyright (C) 2000 John Doe
 (require 'dependency-a)
 

test/project-d/project-d.el

@@ -1,7 +1,7 @@
 ;;; project-d.el --- Test project with several cross-depending `.el' files  -*- lexical-binding: t -*-
 
 ;; Version: 1.0
-;; Package-Requires: ((dependency-a "0.1"))
+;; Package-Requires: ((emacs "24.1") (dependency-a "0.1"))
 ;; Homepage: https://example.com/
 
 ;;; Commentary: