0.12

• removing checksum from submitter and workers to avoid hash calculation before running the tasks (using uid instead)
• saving the hash values for files to avoid content hash recalculation (the content is recalculated only if the time of the last modification has changed)
• adding MultiInputFile and MultiOutputFile to the pydra special types
• fixing environment variable for GithubAction CI
• fixing input_spec for ShellCommandTask with the container_info, spec bases has to be changed DockerSpec or SingularitySpec in order to be used by Docker/SingularityTask
• fixing automatic binding detections for ContainerTask that have files as input (is_local_file is now slightly more robust that work for input that has more complex type in the spec)
• expanding callable function used in field metadata, it can now use output_dir, entire inputs object or a specific field from the inputs