Update requirements.txt

to address the Runtime error
2023-08-05 19:24:14.499 INFO matplotlib.font_manager: generated new fontManager
Traceback (most recent call last):
File "/home/user/.local/bin/streamlit", line 5, in <module>
from streamlit.web.cli import main
File "/home/user/.local/lib/python3.8/site-packages/streamlit/__init__.py", line 55, in <module>
from streamlit.delta_generator import DeltaGenerator as _DeltaGenerator
File "/home/user/.local/lib/python3.8/site-packages/streamlit/delta_generator.py", line 43, in <module>
from streamlit.elements.arrow_altair import ArrowAltairMixin
File "/home/user/.local/lib/python3.8/site-packages/streamlit/elements/arrow_altair.py", line 36, in <module>
from altair.vegalite.v4.api import Chart
ModuleNotFoundError: No module named 'altair.vegalite.v4'

requirements.txt

@@ -11,3 +11,4 @@ streamlit==0.84.1
 tqdm==4.64.1
 urllib3==1.26.14
 rdkit
+altair==4.0