japicmp doesn't report anything when a package-private inner class becomes private

(not a Maracas issue _per se_, just to keep track)

V1:
```
class Outer {
	class Inner {
		
	}
}
```

V2:
```
class Outer {
	private class Inner {
		
	}
}
```

Result:
```
rascal> compareJars(|file:///v1.jar|, |file:///v2.jar|, "v1", "v2")
list[APIEntity]: []
```