declare requests as a dependency

[erral]

requests is declared as a dependency in the requirements.txt file but not in the setup.py file. If the dependency is not declared in the setup.py file, requests is not installed when installing the package from pip, and it breaks:

erral@lindari:/tmp$ virtualenv itzuli-test
created virtual environment CPython3.8.10.final.0-64 in 119ms
  creator CPython3Posix(dest=/tmp/itzuli-test, clear=False, global=False)
  seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/erral/.local/share/virtualenv)
    added seed packages: pip==22.1.2, setuptools==62.2.0, wheel==0.37.1
  activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator
erral@lindari:/tmp$ cd itzuli-test/
erral@lindari:/tmp/itzuli-test$ ./bin/pip install Itzuli
Collecting Itzuli
  Using cached Itzuli-1.1.0-py3-none-any.whl (14 kB)
Installing collected packages: Itzuli
Successfully installed Itzuli-1.1.0
erral@lindari:/tmp/itzuli-test$ ./bin/python
Python 3.8.10 (default, Mar 15 2022, 12:22:08) 
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import Itzuli
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/tmp/itzuli-test/lib/python3.8/site-packages/Itzuli/__init__.py", line 1, in <module>
    from Itzuli.Api import Itzuli
  File "/tmp/itzuli-test/lib/python3.8/site-packages/Itzuli/Api.py", line 4, in <module>
    import requests
ModuleNotFoundError: No module named 'requests'

[erral]

ping