Merge pull request #47 from petrzjunior/return-this

fix: trying to fix types in dist

subscribeSpyTo is generated with `unknown` generic type instead of T, trying to see if this can fix
it

fix(faketime): fix fakeTime for RxJS 7

fix breaking changes of RxJS 7 that break the fakeTime util

fix #39

ci(github): change to github actions

move from travis to github actions

docs: add table of contents to README

feat(observer-spy): add `autoUnsubscribe` and rename `subscribeAndSpyOn`

Here is the list of changes in this PR:

* Rename `subscribeAndSpyOn` to `subscribeSpyTo`
* Rename `ObserverSpyWithSubscription` to `subscriberSpy`
* Add deprecation messages to `subscribeAndSpyOn` and `ObserverSpyWithSubscription`
* Add `autoUnsubscribe`   setup file and `queueForAutoUnsubscribe
* Update and improve README doc
* Update CONTRIBUTING and CODE_OF_CONDUCT docs

closes #15

Co-authored-by: Shai Reznik <[email protected]>

feat: add `subscribeAndSpyOn` (#8)

Co-authored-by: Shai Reznik <[email protected]>

fix: add missing `fakeTime` export

feat(): support async await for `onComplete`

feat(faketime): added fakeTime wrapper function

fakeTime allows you to test async Observables using the VirtualTimeScheduler behind the scenes