npm deprecation/notsup warnings

[Neberheim]

Installing via npm with node v14.09.0/npm 6.14.7 returned several deprecation and not supported warnings:

npm WARN deprecated request-promise@4.2.6: request-promise has been deprecated because it extends the now deprecated request package, see https://github.com/request/request/issues/3142
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated minimatch@1.0.0: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated natives@1.1.6: This module relies on Node.js's internals and will break at some point. Do not use it, and update to graceful-fs@4.x.
/usr/local/bin/agsout -> /usr/local/lib/node_modules/agsout/index.js
npm WARN notsup Unsupported engine for agsout@1.0.4: wanted: {"node":">=6.0 <7.0"} (current: {"node":"14.9.0","npm":"6.14.7"})
npm WARN notsup Not compatible with your version of node/npm: agsout@1.0.4