Describe the bug

I have placed HAR in examples folder of transformer folder.
Created py file with below:
`import transformer.transform as entry

with open("locustfile.py", "w") as f:
entry.dump(f, "[./examples/1.har]")`
and ran transformer library, below is the exception:
➜ transformer git:(master) ✗ python3.9 NaveenTest.py
Traceback (most recent call last):
File "/Users/nmandepudi/transformer/NaveenTest.py", line 4, in
transformer.dump(f, ["./examples/1.har"])
File "/Users/nmandepudi/transformer/transformer/transform.py", line 91, in dump
file.writelines(
File "/Users/nmandepudi/transformer/transformer/transform.py", line 135, in intersperse
yield next(it)
File "/Users/nmandepudi/transformer/transformer/transform.py", line 106, in _dump_as_lines
scenarios = [
File "/Users/nmandepudi/transformer/transformer/transform.py", line 107, in
Scenario.from_path(
File "/Users/nmandepudi/transformer/transformer/scenario.py", line 155, in from_path
if path.is_dir():
AttributeError: 'str' object has no attribute 'is_dir'

Transformer version
Output of the command transformer --version.
1.3.0
To Reproduce
Steps and input files to reproduce the behavior:

1. Create the file "..."
   create py file with below:
   import transformer.transform as entry

with open("locustfile.py", "w") as f:
entry.dump(f, "[./examples/1.har]")

2. Run Transformer with the arguments "..."
   python3.9 <>
3. See error

Expected behavior
A clear and concise description of what you expected to happen.
HAR should be converted py file.

Screenshots
output on running the above py file:

➜ transformer git:(master) ✗ python3.9 NaveenTest.py
Traceback (most recent call last):
File "/Users/nmandepudi/transformer/NaveenTest.py", line 4, in
transformer.dump(f, ["./examples/1.har"])
File "/Users/nmandepudi/transformer/transformer/transform.py", line 91, in dump
file.writelines(
File "/Users/nmandepudi/transformer/transformer/transform.py", line 135, in intersperse
yield next(it)
File "/Users/nmandepudi/transformer/transformer/transform.py", line 106, in _dump_as_lines
scenarios = [
File "/Users/nmandepudi/transformer/transformer/transform.py", line 107, in
Scenario.from_path(
File "/Users/nmandepudi/transformer/transformer/scenario.py", line 155, in from_path
if path.is_dir():
AttributeError: 'str' object has no attribute 'is_dir'

If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. Fedora, MacOS] MacOS
• Version: [e.g. 22]

Additional context
Add any other context about the problem here.