YAML isn't part of the Python standard library, while JSON is.
If we want `setup.py` to dynamically parse the available integration
manifest files in order to populate the extra dependencies, then it's
better to rely on a JSON format for manifest files - the parser is part
of the standard library and it doesn't require the user to install
`pyyaml` before `platypush`.
continuous-integration/drone/push Build is passingDetails
- `iputils` should be an explicit system dependency for `ping`.
Some minimal systems (like some Docker images) may not have the `ping`
command installed out of the box.
- `hid` and `marshmallow_dataclass` should be among the auto-mocked
modules.
Fabio Manganiello