:target Feature Test with @patrickkettner’s suggestions.
Merge pull request #1107 from zachleat/master

:target Feature Test
Added detect for `flex-wrap` (Fixes 1048)
Merge pull request #1048 from stucox/flexwrap

`flex-wrap` contention
add jpeg xr test
just an update to #895. Rebased the current master to fix failing tests,
added metadata
Merge pull request #1036 from patrickkettner/jpeg-xr

add jpeg xr test