Update to dependency on golang.org/x/tools to v0.1.12.

[timothy-king]

This prevents crashes on Go code containing generics. The standard library now contains generics at head and levee crashes for folks using newer toolchains.

See kubernetes/kubernetes#111452.

Reflects running:

go get golang.org/x/tools@v0.1.12
go mod tidy

Fixes #326

[PurelyApplied]

Also overlapping with #325, but a test that uses generics would be a good thing to include.

I kind of feel like this should be folded into #325, so that PR doesn't need all the interface{} to any edits but could keep everything else (with or without the base 1.18 requirement).

[timothy-king]

I kind of feel like this should be folded into #325, so that PR doesn't need all the interface{} to any edits but could keep everything else (with or without the base 1.18 requirement).

I am not sure which order you are suggesting. This then #325. Or #325 then this?

[PurelyApplied]

Your other comment provided some clarity I was missing. We can figure out how to pick up the desired bits of #325 after this.

Thanks!