moving from Travis to Github Actions for CI fixing issues with numpy.arrays provided as input fields adding a combiner option for dotfiles and graphs plots refactoring the input classes (adding FunctionSpec) adding MultiInpObj and MultiOutObj for a possible types in input/output_spec fixing copyfile_workflow setting proper Workflow.output_spec using tasks' output_specs setting output_dir as a parent directory for all files created using the output templates adding requires key to output_spec's metadata in order to set conditions for creating a specific output field adding input_spec and output_spec as class attributes that could be rewritten in the init or in the child classes