fix setLineDash parameter name: value -> segments

[milahu]

use the same parameter name as in typescript/lib/lib.dom.d.ts

interface CanvasPathDrawingStyles {
    // ....
    setLineDash(segments: number[]): void;
}

so we can auto-generate interfaces as shown here

[jtenner]

I'm actually not opposed to this change. LGTM. I need to fix CI however.

[coveralls]

Coverage remained the same at 100.0% when pulling cdb6a23 on milahu:patch-1 into c4d1fb2 on hustcc:master.

[jtenner]

Thank you! I will merge this pull request soon.

[milahu]

same problem with parameters width and height

in typescript/lib/lib.dom.d.ts these appear only as w and h
for example on methods rect or clearRect

can we change these too?
so the typescript/lib/lib.dom.d.ts interface is our single source of truth

edit: mozilla MDN says

void ctx.rect(x, y, width, height);

microsoft typescript says

rect(x: number, y: number, w: number, h: number): void;

but im still voting for consistency with the typescript interface