Summary

Complete refactor to typescript. It's pretty straight forward. It's meant for feathers v4. So it can be released immediately.
I only changed a few things:

• modernized: use eslint, c8 instead of nyc (follow other feathers packages)
• moved sourcecode from '/lib' folder to '/src' folder and use '/lib' as compiled target (follow all feathers packages)
• deprecate applyScope and rename it to ModelWithScope -> more declarative name
• use import { hydrate } from 'feathers-sequelize' -> import from root and not subfolder
• expose convertOperators functions since it can be useful for other
• expose paramsToAdapter as suggested in feat: expose 'paramsToAdapter' method #390
• class now has two generics: ´Service<T, M>´ where T is the crow generic for AdapterService and M is the type of the options.Model. This goes against the generics of dove but it is quite handy to have the right typings for service.Model!

Other than that there's nothing changed. The tests were left as is.

Considering these changes, I would release this as major, just to be sure. Even because the recommended way to import the hydrate/dehydrate hooks will stop working and changes from:

const hydrate = require('feathers-sequelize/hooks/hydrate');

to

const { hydrate } = require('feathers-sequelize');

Closes #390 #395