Update alembic to 1.3.1

1087db48 · Mihai · 0a07606f · 1087db48
Commit 1087db48 authored Dec 06, 2019 by Mihai
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ PyYAML==5.1.2
 SQLAlchemy==1.3.11
 Sphinx==1.8.5
 Werkzeug==0.15.5
-alembic==1.0.11
+alembic==1.3.1
 backtranslate==0.0.5
 biopython==1.75
 chardet==3.0.4