isoWeekday is not a function

[stockiNail]

I got an error isoWeekday is not a function when I try to use the startOf method of the adapter.

chartjs-adapter-luxon/src/index.js

Line 75 in 18d1a9b

return this._create(time).isoWeekday(weekday).valueOf();

Having a look to Luxon documentation, the isoWeekday(weekday) sounds to belong to Moment and not to Luxon.

The doc https://github.com/moment/luxon/blob/master/docs/moment.md#unit-getters

EDIT
Chart.js version: dist/master
Luxon adapter: 0.2.1
Luxon lib: 1.24.1

[benmccann]

Just as a heads up, I don't have time to fix at the moment, but I'll review a PR if you want to take a stab

[stockiNail]

@benmccann let me take time because I'm very busy as well but I can try to submit a PR. Ok for you?

[benmccann]

Sure. No rush

[stockiNail]

@benmccann submitted. Take your time!

[stockiNail]

@benmccann fixed again in order to:

1. calculate the right start of week because previously was wrong the calculation when weekday passed as argument was 7 (Sunday)
2. normalized the weekday passed as argument in order to have always a consistent result even if the weekday argument is not between 1 and 7.