replace archy with a specific implementation, refactor timetree

[Uzlopak]

archy is 9 years old and you can not find the repo on github anymore.
this PR replaces the need for archy and removes some double processing

added also a unit test as #205 got also fixed, i presume.

Edit:
removed unreachable code and added jsdoc types.
test coverage 100% for time-tree.js

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[mcollina]

lgtm

[mcollina]

it might be worth moving that archy clone in another repo, I think we use it in find-my-way as well

[Uzlopak]

@mcollina
I checked it and find-my-way does not use archy. Also this is an adaptation for the specific need of avvio.

@Eomm

Can you have a look regarding bug #205?

[Eomm]

it might be worth moving that archy clone in another repo, I think we use it in find-my-way as well

I have a fork - https://github.com/Eomm/node-archy
I may publish it with a bit rework

[Uzlopak]

I removed unreachable code, added jsdoc typings

[mcollina]

lgtm