chore: remove unused dependencies

[KristjanESPERANTO]

This PR removes all unnecessary dependencies. They made it difficult to install the module, as several error messages appeared during npm install.

[ralberth]

Excellent PR! Thanks for taking the time to do this. I'll do you one better: this repo isn't actively developed anymore, but generally works. Instead of depending on the specific locked, transitive dependencies in package-lock.json, I just removed the file entirely. This way, each build picks up the latest dependency minor versions and avoids obvious CVEs, etc. Do a 'git pull' to grab the last commit.

Thanks for caring and sending in a PR!

[KristjanESPERANTO]

Unfortunately, removing package-lock.json didn't help. The dependencies I wanted to remove with the PR are still listed in package.json.

[ralberth]

Crap, sorry. Didn't read the whole PR :-( Problem of knocking out todos on a weekend afternoon.
I removed a bunch from package.json, have a 'git pull' and LMK.

[KristjanESPERANTO]

I have updated my PR to the current status of your repository. In addition to removing the redundant dependency, I have also addressed a few minor issues listed here on the module check page. No logical changes, just chores 🙂