Update requirements.txt

requirements.txt

@@ -1,16 +1,16 @@
-arxiv2bib==1.0.8
-black==21.7b0
-citeproc-py==0.5.1
-citeproc-py-styles==0.1.2
-Flask==2.0.1
-Flask-DebugToolbar==0.11.0
-google==3.0.0
-gunicorn==20.1.0
-json5==0.9.6
-nameparser==1.0.6
-pytest==6.2.5
-requests==2.26.0
-requests-cache==0.8.1
-sentry-sdk==1.3.1
-unidecode==1.3.2
-validators==0.18.2
+arxiv2bib
+black
+citeproc-py
+citeproc-py-styles
+Flask
+Flask-DebugToolbar
+google
+gunicorn
+json5
+nameparser
+pytest
+requests
+requests-cache
+sentry-sdk
+unidecode
+validators