Cabal 3.0 set-like aggregation syntax

[hvr]

Starting with Cabal 3.0, there's a more concise way to represents ||-unions of ^>= and == expressions

It's documented at https://cabal.readthedocs.io/en/latest/developing-packages.html#pkg-field-build-depends:

---

Starting with Cabal 3.0, a set notation for the == and ^>= operator is available. For instance,

tested-with: GHC == 8.6.3, GHC == 8.4.4, GHC == 8.2.2, GHC == 8.0.2,
             GHC == 7.10.3, GHC == 7.8.4, GHC == 7.6.3, GHC == 7.4.2

build-depends: network ^>= 2.6.3.6 || ^>= 2.7.0.2 || ^>= 2.8.0.0 || ^>= 3.0.1.0

can be then written in a more convenient and concise form

tested-with: GHC == { 8.6.3, 8.4.4, 8.2.2, 8.0.2, 7.10.3, 7.8.4, 7.6.3, 7.4.2 }

build-depends: network ^>= { 2.6.3.6, 2.7.0.2, 2.8.0.0, 3.0.1.0 }

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maybe this would be a useful additional output syntax to support in staversion?

[debug-ito]

Thanks for information! That may be an interesting feature.