Replace Base.floatrange with simplified implementation

[metab0t]

Base.floatrange has bugs and is not public API anymore
See JuliaLang/julia#45336
Use a simplified implementation instead
Fixes #667 and #616

[getzze]

Thanks for find a workaround for this worrying bug!
Base.TwicePrecision is also not public API, so it would be better not to use it either, but instead to rework the histrange to simplify it in the first place. What do you think?

[ararslan]

It's true that TwicePrecision is technically not public but there are a lot of packages that use it (and have done so for a long time). I think it's okay to use it here.

[metab0t]

It's true that TwicePrecision is technically not public but there are a lot of packages that use it (and have done so for a long time). I think it's okay to use it here.

I agree. Depending on TwicePrecision is more reliable because of its clear semantics and IIRC it is designed to use with StepRangeLen.

[ararslan]

The failures on Julia nightly are unrelated. Thanks for the contribution, much appreciated!