FixedPoint and FixedPointValue have different default values for signed #249
Description
Describe the bug
FixedPoint defaults to a signed version whereas FixedPointValue defaults to an unsigned version.
They should be the same, but this is a breaking change as there could be reliance on the default.
To Reproduce
No response
Expected behavior
No response
Actual behavior
No response
Additional: Dart SDK info
No response
Additional: pubspec.yaml
Additional: Context
No response