Rework module parsing and execution (#4462)

This patch disables automatic detection of module code, and instead
requires the user to explicitly specify whether to parse a source
as a module or as a script.

To achieve this the jerry_parse API function now takes a new option
which signals that the source should be parsed as a module.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai daniel.batyai@h-lab.eu

docs/02.API-REFERENCE.md

@@ -212,8 +212,10 @@ Option bits for [jerry_parse](#jerry_parse) and
 
  - JERRY_PARSE_NO_OPTS - no options passed
  - JERRY_PARSE_STRICT_MODE - enable strict mode
+ - JERRY_PARSE_MODULE - parse source as an ECMAScript module
 
 *New in version 2.0*.
+*Changed in version 2.4: Added `JERRY_PARSE_MODULE`.*
 
 ## jerry_gc_mode_t