Allow text-2.0, accurate dep bounds

[ysangkok]

Tested using this configuration as an example of Aeson between 2 and 2.0.2 (also demonstrates text>=2):

cabal test --constraint 'text>=2' --constraint='generic-arbitrary<0.3' -w ghc-9.0.2 --enable-tests --constraint='aeson==2.0.2.0'

Using this for Aeson 2.0.3+:

cabal test --constraint='generic-arbitrary<0.3' -w ghc-9.0.2 --enable-tests --constraint='aeson==2.0.3.0'

The cabal file is regenerated and this lowers the generic-arbitrary bound which was raised to allow the 0.3 series, even though it isn't even released.

[Vlix]

Looks fine, just a small adjustment needed in /test.

And yeah, the cabal file having generic-arbitrary < 0.4 was an oversight on my part. Somewhere in making a PR I forgot to build before pushing, I think.