(MAINT) improve README description

[kevpl]

[skip ci]

[tvpartytonight]

Are we opinionated about if we want people to do this in their test files or in their helper somewhere? This might be a good place to endorse the usage of helpers to make the DSL available to the entirety of a test run, instead of individual tests.

Also, I think that you mean "installed the gems" not "installed the games". 👾 🎲 🎮

[tvpartytonight]

Maybe we should specify the version 3.x here?

[kevpl]

@tvpartytonight to your question about versions: great point, I've put version numbers in the section headers. Look good ❓

Fixed the typo (games -> gems), and to the larger question left there (from outdated folder):

Are we opinionated about if we want people to do this in their test
files or in their helper somewhere? This might be a good place to
endorse the usage of helpers to make the DSL available to the
entirety of a test run, instead of individual tests.

My opinion is that people should use the library code exactly where they need it. It will typically be from a test, but if they want to write their own helpers on top of the methods in the library, then they'll have to include it there too. I don't see the advantage of being opinionated about which place this goes in at this point. Am I just missing the advantage you're thinking of ❓

[tvpartytonight]

Once a library is required in more than just a few files/tests, I think it makes sense to include at the helper level, since it reduces copy 🍝 from test to test. But the language here is fine, I just wanted to bring it up since I was thinking about it.