www/nginx-devel: update NGINX JavaScript module to 0.7.0.

Bump PORTREVISION.

<ChangeLog>

nginx modules:

*) Feature: added HTTPS support for Fetch API.

*) Feature: added setReturnValue() method.

Core:

*) Feature: introduced Async/Await implementation.

*) Feature: added WebCrypto API implementation.

*) Bugfix: fixed copying of closures for declared

functions. The bug was introduced in 0.6.0.

*) Bugfix: fixed unhandled promise rejection in handle

events.

*) Bugfix: fixed Response.headers getter in Fetch API.

</ChangeLog>