Version 1.0.1

• Fixes small something

Version 1.0.0

• Supports delay option to start each promise with delay

Version 0.10.0

• countTag method supports the count-up number of second argument.

Version 0.9.3

• Fix when workPromise doesn't return promises

Version 0.9.1

• workPromise supports lazy evaluation.

Version 0.9.0

Support workPromise returning multiple promise

Version 0.8.0

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