[Bug Report][1.5.0] --yaml does not support relative patch

[tai271828]

Description

--yaml /tmp/general-plots-en.yamls works.
--yaml ./general-plots-en.yamls does not work.

rg-cli version

1.5.0

Actual Behavior

Traceback (most recent call last):
  File "/home/tai271828/.local/share/virtualenvs/pycontw-postevent-report-generator-O9WfcvCq/bin/rg-cli", line 33, in <module>
    sys.exit(load_entry_point('pycontw-report-generator', 'console_scripts', 'rg-cli')())
  File "/home/tai271828/.local/share/virtualenvs/pycontw-postevent-report-generator-O9WfcvCq/lib/python3.7/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/home/tai271828/.local/share/virtualenvs/pycontw-postevent-report-generator-O9WfcvCq/lib/python3.7/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/home/tai271828/.local/share/virtualenvs/pycontw-postevent-report-generator-O9WfcvCq/lib/python3.7/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/tai271828/.local/share/virtualenvs/pycontw-postevent-report-generator-O9WfcvCq/lib/python3.7/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/home/tai271828/work-my-projects/pycontw-projects/demo-post-event-02/pycontw-postevent-report-generator/report_generator/controller/report_generator_cli.py", line 142, in main
    report_yaml = report_generatoryaml.read_yaml(yaml)
  File "/home/tai271828/work-my-projects/pycontw-projects/demo-post-event-02/pycontw-postevent-report-generator/report_generator/io/yaml.py", line 9, in read_yaml
    with open(input_yaml, "r") as stream:
FileNotFoundError: [Errno 2] No such file or directory: './general-plots-en.yamls'