Catch `e57::E57Exception` exceptions in tests

[marxin]

I'm trying to update the project to Conan package and it seems the MacOS tests fail:
libe57format-macos.txt

Can you please catch the aforementioned exception so that we can debug it?

[asmaloney]

I'm not sure what you're asking for here. test_package isn't part of libE57Format.

[marxin]

You're right, it's a smoke test that lives in Conan repository.

[asmaloney]

There is a test suite for the library - it should probably run that?