Various errors on install

[RickCogley]

Hi - the libraries in use could probably use a refresh. This is the log from the install on my CI, and it looks like there's some deprecated stuff in use (although, it does work):

Run npm install postmark-cli -g
npm WARN deprecated [email protected]: request has been deprecated, see request/request/issues/3142
npm WARN deprecated [email protected]: this library is no longer supported
npm WARN deprecated [email protected]: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See v8.dev/blog/math-random for details.
npm WARN deprecated [email protected]: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (visionmedia/debug/issues/797)
/opt/hostedtoolcache/node/14.17.6/x64/bin/postmark -> /opt/hostedtoolcache/node/14.17.6/x64/lib/node_modules/postmark-cli/dist/index.js

> [email protected] postinstall /opt/hostedtoolcache/node/14.17.6/x64/lib/node_modules/postmark-cli/node_modules/ejs
> node ./postinstall.js

+ [email protected]
added 225 packages from 235 contributors in 13.268s