Type miss-match between `runTask` and `cancelTask`

[vstefanovic97]

Right now if we do

const timerId = runTask(this, () => {}, 100);

cancelTask(this, timerId);

We will get the following error

Argument of type 'Timer' is not assignable to parameter of type 'EmberRunTimer'.
  Type 'number' is not assignable to type 'EmberRunTimer'.ts(2345)

Not sure exactly if runTask signature is wrong or are the arguments for cancelTask wrong but I'm definitely sure the types should match

ps. this probably relates to https://github.com/ember-lifeline/ember-lifeline/issues/876

[vstefanovic97]

Also I'd recommend rewritting tests to TS to prevent such type regressions in the future

[angelayanpan]

we have a couple of places in our code base.

where I see people doing cancelTask(this, this._runTaskId as unknown as EmberRunTimer); because of the mismatch