Update requirements.txt

requirements.txt

@@ -1,4 +1,3 @@
-shiny==0.6.0
-shinyswatch==0.4.1
-seaborn==0.12.2
-matplotlib==3.7.1
+fastapi>=0.68.0,<0.69.0
+pydantic>=1.8.0,<2.0.0
+uvicorn>=0.15.0,<0.16.0