Fix assign for other definitions of Task

Fix cancellation failures

Prepare for deno deploy

feat(resolve): Resolve task as promise

BREAKING CHANGE: Task class has a new method that is incompatible with
older instances of this class.

feat(elseDo): Side effects for failed tasks

fix(race): Fix hanging processes for incomplete race tasks

fix(loop): Fix task loop on NodeJS

feat(loop): Relase loop

BREAKING CHANGE: Changes the class methods on Task

feat(do): Add `do` operator

feat(par): Adds `race` and `all` to Task