www/angie-module-njs: Update 0.9.1 => 0.9.4

Changelogs:
https://github.com/nginx/njs/releases/tag/0.9.2
https://github.com/nginx/njs/releases/tag/0.9.3
https://github.com/nginx/njs/releases/tag/0.9.4

PR: 291491
(cherry picked from commit a700775bc6dd3246c939038191c8d892e749db96)