Fix deprecated assertFileNotExist

[mpoiriert]

Q	A
Bug fix?	yes
New feature?	no
Doc updated	no
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	#...
License	MIT

[goetas]

I think that you should increase the minimum required version of phpunit, as some builds are failing

[mpoiriert]

Yes you are right. I have remove 7 since it reach it's end of support

[mpoiriert]

So it's not compatible with PHPUnit 8.0 either.

Do you want me to remove it ? If there is no need to have a older version require dev.
9 Is only with php 7.3. So we will have a conflict.
I'll need to remove my fix but do you want me to still remove PHPUnit 7 or I just cancel the PR ?

[goetas]

I think that removing phpunit 7 is ok, regarding your changes, unfortunately I think that we have to postpone them

[mpoiriert]

There is always a way.

I did that so we don't have the deprecated warning, it's a temporary fix.

[goetas]

nice! thanks!