Added 'ch4-requirements.txt' file

Author: jatinpapreja

Ch4/ch4-requirements.txt

@@ -0,0 +1,21 @@
+numpy==1.19.5
+pandas==1.1.5
+scikit-learn==0.23.2
+nltk==3.5
+gensim==3.8.3
+wget==3.2
+fasttext==0.9.2
+tensorflow==1.14.0
+torch==1.9.0
+pytorch_pretrained_bert==0.6.2
+tqdm==4.41.1
+matplotlib==3.2.2
+beautifulsoup4==4.6.3
+ktrain==0.26.3 
+lime==0.2.0.1
+seaborn==0.11.1
+shap==0.39.0
+fastai==1.0.60
+
+
+