Support for Trixi.jl versions < 0.9?

[tristanmontoya]

In trixi-framework/Trixi.jl#2037, the unused parameter initial_condition was removed from rhs!. In my implementation of a new rhs! method for the covariant solver in #31, should I have a second version that takes initial_condition to maintain compatibility with older Trixi.jl versions? Or should we just change the compat in Project.toml to only be 0.9? I have no problem either way but I was wondering if there's any good reason to support such earlier versions of Trixi.jl.

[benegee]

Perfectly fine with me!
As long as we do not have any releases, there seems to be no reason to be backward compatible.

[ranocha]

Yes, I agree - just update the compatibility section of the Project.toml file accordingly and restrict the development here to the new version of Trixi.jl

[tristanmontoya]

Support for versions < 0.9 is now dropped as of #47.