Merge branch 'modules-async'

modules/specification.md

@@ -19,6 +19,7 @@ No requirement in this section implies that a module system must enforce
 that requirement.  These are merely requirements that a module must
 satisfy in order to function in any module system.
 
+1.  A module must be encoded in UTF-8.
 1.  A module must only read and write variables in its lexical scope.
 1.  A module must only assume that its lexical scope contains the free
     variables ``require``, ``module``, ``exports``, and ``define``