Updated brick/math dependency to 0.18.0

[mic2100]

Also fixed many deprecation issues throughout the repo

This will also work with any math/brick version from 0.14.8 and above

[vadymtsots]

@mic2100 thanks for the PR, these are useful changes!
I have only one concern about the usage of @ before file_get_contents and imagecreatefromstring. It may make the debugging and diagnostics harder for the consumers of the package, so I would leave it as it is and let the consumers handle these warnings

[mic2100]

I am running on 8.5 and keep getting these warnings and deprecation issues

And when I upgrade to math/brick 0.18.0 I get the same, so it was an attempt to prevent them from showing. I have changed the way it ignores the errors in the tests.