Pydra

- fixing command line for tasks wit splitter and templates in the inputs
- adding `absolute_path` option to output spec
- adding `formatter` to format input before adding it to the command line (similar to callable but for inputs)

- fixing output files names with wildcard
- fixing `argstr` with f-string

- fixing copyfile input
- adding flexibility to position of the shell task fields
- Simplify output_spec definition and population
- Various adjustments to ShellCommandTask
- adding full traceback to the error files
- updating Ubuntu for CI
- fixing templates with float formatting and multiple fields
- fixing hashing function for numpy objects
- fixing __call__ function for Workflow
- adding container dimension concept to the `split` method
- adding `LazyField` for MultiInputFiles
- fixing issues with `SoftFileLock` with `asyncio`
- style and black updates
- fixing connections with multiple inputs

- reverting some changes to `hash_value` function, the part for arbitrary object didn't work well

- fixing `MultiInputObject` in the `input_spec`
- fixing numpy objects hashing
- small improvements to the `run` method for `Workflow` (moving some part to the softlock file block)

- changing the way of getting event loop with asyncio - more robust solution that should work even if `get_event_loop` raise an error
- adding option to specify a name of `Directory` using `output_file_template`