Add missing `deprecation` package to `requirements.txt`.
1.7.0
Changes in this release:
* Beginning with this release, the function `reset()` is deprecated in favor of the function `reset_interrupts()`. * The function `wait()` resets the interrupt state before it begins waiting.
1.6.3
This release fixes some unexpected failures in `flattened(...)`.
1.6.2
This release expands `flattened(...)` to deal with iterators and generators.
1.6.1
This release fixes a bug in version 1.6.0.
1.6.0
This release adds the new function `flattened(...)`