Add compat bounds for all dependencies.

[twavv]

No description provided.

[tkoolen]

MacroTools unfortunately also dropped 0.7 support when it dropped 0.6 support for some reason. MacroTools 0.4 should install and work on Julia 0.7, I think.

[twavv]

I was leaning towards dropping 0.7 support (thoughts?).

[tkoolen]

That's another option. But it kind of becomes this cascade where now dependencies of this package also need to stop testing on / advertising support for 0.7, and not really for a good technical reason. I think MacroTools 0.4 will be fine for testing on 0.7 for the foreseeable future. And if not, we could always switch then, or submit a trivial PR to MacroTools to change the compat to get their latest.

I believe you do need an upper bound on julia in the compat section to get the version tag auto-merge bot to work by the way.

[twavv]

I see your point but I also don't think 0.7 is in wide use today. Plus it causes some issues with Travis (which are fixable but...).

[tkoolen]

Do whatever you think is best. It's not a huge deal either way.