Refactor code and update requirements

app.py

@@ -1,7 +1,7 @@
-import gradio as gr
 import time
 import torch
 import scipy.io.wavfile
+import gradio as gr
 from espnet2.bin.tts_inference import Text2Speech
 from espnet2.utils.types import str_or_none
 

requirements.txt

@@ -1,7 +1,12 @@
-espnet==0.10.3 
-pyopenjtalk==0.1.5 
-parallel_wavegan==0.5.3 
+espnet
+pyopenjtalk==0.3.2
+parallel_wavegan
 espnet_model_zoo
 scipy
 torch
-typeguard==2.13.3
+typeguard==2.13.3
+numpy
+gradio
+torch
+torchvision
+torchaudio