Add the gap property to jsxDOMStyle

[mununki]

• ReactDOMStyle.t: add gap prop rescript-react#86

[mununki]

I'm wondering if we need to add it to 10.1 https://github.com/rescript-lang/rescript-compiler/blob/10.1_release/jscomp/others/jsxDOMStyle.ml

[cknitt]

@mununki I think it would be good to have it in the 10.1_release branch, too, but it most likely won't make it into 10.1.2 anymore as @ryyppy already created a 10.1.2 playground bundle for the upcoming release.

[mununki]

@mununki I think it would be good to have it in the 10.1_release branch, too, but it most likely won't make it into 10.1.2 anymore as @ryyppy already created a 10.1.2 playground bundle for the upcoming release.

No problem, I'll make a PR for 10.1.