Use yaml.safe_load() instead of load()

[nsoranzo]

Fix warnings like:

planemo/shed/__init__.py:436: YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
  config = yaml.load(f)

[martenson]

This is pure refactoring, right? afair safe() is just a wrapper around safe_load() now.

[nsoranzo]

You mean load() is just a wrapper?

And no, if you read at link in the message above it clearly states:

Since load cannot break backward compatibility to call safe_load, the maintainers of PyYAML decided to simply deprecate the plain usage of load, and require that the user intentionally declare the Loader they desired.

and

FullLoader: Loads the full YAML language. Avoids arbitrary code execution. This is currently (PyYAML 5.1) the default loader called by yaml.load(input) (after issuing the warning).

while safe_load() use the SafeLoader.

[martenson]

My memory failed me then. 👀