Cmem-plugin-base

Changed

- python >= 3.7 dependency
- examples dev-dependency
- update dependencies

Added

- `autocompletion_enabled` method to ParameterType class to signal whether autocompletion should be enabled.

Changed

- downgrade needed python version to 3.7+

Fixed

- Fixed `discover_plugins_in_module`: Need to reload modules that have been imported already.

Added

- Support for custom plugin parameter types
- Enumeration parameter type

Fixed

- Only return parameters for user-defined init methods