bump allowed version of DataFrameMacros to 0.3?

[dmbates]

The top-level Project.toml file lists a compat for DataFrameMacros of "0.2" and "0.3" is now available. Can the compat be updated?

I am only considering the top-level Project.toml file here, not the 10 or 12 copies scattered around the repository. I try to pretend that those don't exist.

[palday]

There are some proper breaking changes in the bump, which I why I set the compat limits. Are we impacted by e.g. jkrumbiegel/DataFrameMacros.jl#24?

[dmbates]

I kind of suspected that there would be hurdles. I don't use the deep magic myself but others might so it will be necessary to examine the consequences if we ever get this repository cleaned up. We should hold off on changing the compat.