src: fix cjs_lexer external reference registration

It needs to be added to the list to actually get registered.

Author: joyeecheung

src/node_external_reference.h

@@ -67,6 +67,7 @@ class ExternalReferenceRegistry {
   V(buffer)                                                                    \
   V(builtins)                                                                  \
   V(cares_wrap)                                                                \
+  V(cjs_lexer)                                                                 \
   V(config)                                                                    \
   V(contextify)                                                                \
   V(credentials)                                                               \