[css-grid] Implement hack for place-self property

[bogdan0083]

Fixes #1143

The tests for this PR are failing because I need to find a way to make place-self hack to not add prefixes if css grid is disabled (described the problem here)

But the prefixes are being added correctly and can be tested 😀

/cc @Dan503

[ai]

@bogdan0083 Thanks. It was really fast. Good work.

But seems like you forget to check processor.gridStatus before accepting this rule (so grid: false or /* autoprefixer grid: off */ will not switch it off).

@Dan503 can I ask you yo make quick look?

[ai]

@bogdan0083 to make test, you can put if here https://github.com/postcss/autoprefixer/blob/master/lib/processor.js#L270

[Dan503]

I'm doing a bit of testing now. I'm also double checking that it works in IE the way I expect it to.

[Dan503]

Bogdans Code seems to work exactly as expected. Thanks @bogdan0083! 😁

To prove it does what I think it does in IE, here is a code pen:
https://codepen.io/daniel-tonon/pen/gBzXMK

You can view the demo in IE here to prove that the prefixes work:
https://s.codepen.io/daniel-tonon/debug/gBzXMK/VGrWNwpdDYZM

[bogdan0083]

@ai I added the condition and the tests are passing now 👍

[ai]

Released in 9.3