The `unittest` library still contains a number of bare exceptions, which
now result in warnings from the compliler. Patching the standard library
to remove these warnings is outside the scope of this project, so we're
going to ignore these warnings.
- newVC3_Tel was not assigning the value provided to the constructed
object.
- Private unit tests were run every time the code was compiled due to
how the unittest library works. These now only run as part of the unit
tests with `nimble test`.
- `parseDateOrDateTime attempts to parse times starting from the most
specific (date and time) to least specific.
- `set` and `add` functions allow adding multiple content items at once
using varargs.
