Convert ALL DateTime values to UTCDateTime in Query\Builder::compileWheres

[D-02022020]

$builder->where('timestamp', '>=', $carbonDateObject1)->where('timestamp', '<=', $carbonDateObject2)

was working, but

$builder->whereBetween('timestamp', [$carbonDateObject1, $carbonDateObject2])

wasn't.

This was because in the compileWheres function only converted $where['value'] to UTCDateTime, but not $where['values'], where the former was filled in easy queries and the latter one in between queries. MongoDB then couldn't handle the given Carbon objects (possibly autoconverted to strings)

[D-02022020]

oh, I see it's a duplicate of https://github.com/jenssegers/laravel-mongodb/pull/953/files , but that one has merge conflicts

[D-02022020]

#1328 contains the exact same diff and has been merged