Parse error at "'# Note: '": Expected W:(0-9A-Za-z)

python inspector 0.9.8 fails to parse a requirements.txt file containing:

```
molecule==2.22
taskcat==0.9.20
```

This error does not happen with python inspector 0.9.4

Stacktrace:

```
> python-inspector --python-version 310 --operating-system linux --json-pdt o.json --analyze-setup-py-insecurely --requirement requirements.txt
Traceback (most recent call last):
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/packvers/requirements.py", line 102, in __init__
req = REQUIREMENT.parseString(requirement_string)
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/pyparsing/core.py", line 1141, in parse_string
raise exc.with_traceback(None)
pyparsing.exceptions.ParseException: Expected W:(0-9A-Za-z), found '#' (at char 0), (line:1, col:1)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/resolve_cli.py", line 247, in resolve_dependencies
resolution_result: Dict = resolver_api(
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/api.py", line 263, in resolve_dependencies
resolution, purls = resolve(
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/api.py", line 322, in resolve
resolved_dependencies, packages = get_resolved_dependencies(
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/api.py", line 360, in get_resolved_dependencies
resolver_results = resolver.resolve(requirements=requirements, max_rounds=max_rounds)
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/resolvelib/resolvers.py", line 546, in resolve
state = resolution.resolve(requirements, max_rounds=max_rounds)
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/resolvelib/resolvers.py", line 427, in resolve
failure_causes = self._attempt_to_pin_criterion(name)
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/resolvelib/resolvers.py", line 239, in _attempt_to_pin_criterion
criteria = self._get_updated_criteria(candidate)
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/resolvelib/resolvers.py", line 229, in _get_updated_criteria
for requirement in self._p.get_dependencies(candidate=candidate):
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/resolution.py", line 644, in get_dependencies
return list(self._iter_dependencies(candidate))
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/resolution.py", line 635, in _iter_dependencies
for r in self.get_requirements_for_package(purl=purl, candidate=candidate):
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/resolution.py", line 497, in get_requirements_for_package_from_pypi_simple
yield from get_reqs_insecurely(
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/resolution.py", line 277, in get_reqs_insecurely
yield from parse_reqs_from_setup_py_insecurely(setup_py=setup_py_location)
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/resolution.py", line 128, in parse_reqs_from_setup_py_insecurely
for req in iter_requirements(level="", extras=[], setup_file=setup_py):
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/python_inspector/setup_py_live_eval.py", line 151, in iter_requirements
pkg = Requirement(req)
File "/Users/bennati/.pyenv/versions/scancode/lib/python3.8/site-packages/packvers/requirements.py", line 104, in __init__
raise InvalidRequirement(
packvers.requirements.InvalidRequirement: Parse error at "'# Note: '": Expected W:(0-9A-Za-z)
```