Update without-project-cache! macro

To match upstream changes in projectile

core/autoload/projects.el

@@ -7,10 +7,9 @@
 (defmacro without-project-cache! (&rest body)
   "Run BODY with projectile's project-root cache disabled. This is necessary if
 you want to interactive with a project other than the one you're in."
-  `(let (projectile-project-name
-         projectile-require-project-root
-         projectile-cached-buffer-file-name
-         projectile-cached-project-root)
+  `(let ((projectile-project-root-cache (make-hash-table :test 'equal))
+         projectile-project-name
+         projectile-require-project-root)
      ,@body))
 
 ;;;###autoload