1.6.0

• Added new method once, to simplify use of once-off event subscribers.

1.5.4

• Package updated, for better search results.

No code changes.

1.5.3

• Documentation updates only.

1.5.2

• Documentation + code refactoring around method toPromise.

1.5.1

• Added option onCancel handler to ISubOptions
• Implemented #20, using the new onCancel option.

1.5.0

• Fixed #19, and as a result, all Extras have been fully revamped.

1.4.0

• Added new method toPromise to the base class SubEvent.

1.3.6

• Code + docs refactoring.

1.3.5

• Code refactoring: made data in ISubContext optional.
• Added error handling for invalid options in 3 places.

1.3.4

• Updated for better use of the latest TypeScript syntax.
• DEV dependencies updated.