Branch develop: CLI fails to validate what previously worked in branch web

[sneumann]

Describe the bug
CLI validation fails in develop branch (a0dfa7c).
with error shown below.
It would be great to include that branch in the github action https://github.com/ElixirTeSS/bioschemas-validator/actions
Yours,
Steffen

sneumann@laptop:~/src/bioschemas-validator$ cat empty.json
{
}
sneumann@laptop:~/src/bioschemas-validator$ python command.py validate  --target_data=empty.json
Action: validate, target: empty.json
Traceback (most recent call last):
  File "/home/sneumann/src/bioschemas-validator/command.py", line 229, in validateData
    data, dataPath = path_to_dict(pathlib.Path(dataName))
  File "/home/sneumann/src/bioschemas-validator/src/Classes/validator.py", line 286, in path_to_dict
    orgString = path.read_text()
  File "/home/sneumann/miniconda3/lib/python3.9/pathlib.py", line 1266, in read_text
    with self.open(mode='r', encoding=encoding, errors=errors) as f:
  File "/home/sneumann/miniconda3/lib/python3.9/pathlib.py", line 1252, in open
    return io.open(self, mode, buffering, encoding, errors, newline,
  File "/home/sneumann/miniconda3/lib/python3.9/pathlib.py", line 1120, in _opener
    return self._accessor.open(self, flags, mode)
FileNotFoundError: [Errno 2] No such file or directory: '{'

Working version in web branch (00b6608)

sneumann@laptop:~/src/bioschemas-validator$ python src/command.py validate  --target_data=empty.json && cat output.txt 
Action: validate
empty.json is a file
The target metadata is empty.json
###########Start Validation#############
The profile schemas, "", does not yet exist in the profile JSON schema directory, please add it first by running buildprofile with the source data for "".
###########End Validation#############