Fix dependency conflicts - use flexible version ranges

requirements.txt

@@ -1,7 +1,7 @@
-gradio==4.44.0
-transformers==4.35.0
-torch==2.1.0
-nltk==3.8.1
-textstat==0.7.3
-numpy==1.24.3
-pandas==2.0.3
+gradio>=4.40.0
+transformers>=4.30.0
+torch>=2.0.0
+nltk>=3.8
+textstat>=0.7.0
+numpy>=1.24.0
+pandas>=2.0.0