Add tests for texture.minFilter

[toxicFork]

See #166

• [ ] 1. Could check that the functionality works as expected.
• [ ] 2. Could also somehow verify that the texture does not need any other properties updated e.g. some texture fields need needsUpdate to be set, need to investigate whether that is the case or not.

For [2] there may need to be graphics tests (eugh) or it could just be confirmed by eye and say "yep, I tried it, when I update the property it does change what's on the screen the right way".

Potential blockers: #35 and #88 ...