update requirements

requirements.txt

@@ -1,17 +1,18 @@
-allennlp==0.9.0
-gensim==3.8.1
-nltk==3.4.5
-numpy==1.18.2
-pandas==0.25.3
-ply==3.11
-pyarrow==0.16.0
-pytest==5.4.1
-scikit-learn==0.22.1
-scipy==1.4.1
-sentence-transformers==0.2.5.1
-slate3k==0.5.3
-typing==3.7.4.1
-tqdm==4.45.0
+allennlp~=0.9.0
+gensim~=3.8.1
+nltk~=3.4.5
+numpy~=1.18.2
+pandas~=0.25.3
+ply~=3.11
+pyarrow~=0.16.0
+pytest~=5.4.1
+s3fs~=0.4.2
+scikit-learn~=0.22.1
+scipy~=1.4.1
+sentence-transformers~=0.2.5.1
+slate3k~=0.5.3
+typing~=3.7.4.1
+tqdm~=4.45.0
 # local package
 -e .
 # external requirements
@@ -21,8 +22,3 @@ coverage
 flake8
 python-dotenv>=0.5.1
 Sphinx
-
-PyYAML~=5.1.2
-setuptools~=47.1.1
-s3fs~=0.4.2
-sklearn~=0.0