fixed_trigonometry 0.2.2

Fixed point numerical approimations to trigonometric functions.
Documentation
# Release Notes

## Release 0.2.2 (2021-10-31)

- Corrected edge case in Nonlinear IIR Filter sqrt method.

## Release 0.2.1 (2021-10-24)

- Added the Nonlinear IIR Filter sqrt method.

## Release 0.2.0 (2021-10-23)

- Separated out atan approximations to own file.
- Addad a fast atan approximation.
- Added test for powi.

## Release 0.1.2 (2021-09-18)

- Added complex powi.

## Release 0.1.1 (2021-09-18)

- Reduced division denominators in sin to reduce overflow issues.

## Release 0.1.0 (2021-09-18)

- First release.

**Contributors**: ErikBuer