v2.0.1

Quaternionic v2.0.1

Diff since v2.0.0

Fixes an issue with some auto-differentiation packages (e.g., ForwardDiff) where NaNs would be computed for the second derivative of the exponential of 0, rather than regular values. Derivatives with those packages should now be accurate to second order, though they may still fail at higher order for this particular value.

Merged pull requests:

• Bump codecov/codecov-action from 4 to 5 (#69) (@dependabot[bot])