100% individual package code coverage

[zimmski]

Coverage is currently very low: https://coveralls.io/r/zimmski/tavor

The reason is that package coverage is done for each package on its own so that e.g. parser tests to not change the coverage of fuzzer tests.

Although this means that the actual overall coverage is MUCH higher it is not a reason to not fully test everything on its own.

This issue should stay open until we have full individual package coverage. If conditional coverage can be enabled in the future. This issue should be opened again to address this too.