gnu: Add python-sqlalchemy@1.3.

* gnu/packages/databases.scm (python-sqlalchemy-1.3): New variable.

Signed-off-by: Tobias Geerinckx-Rice <me@tobias.gr>

gnu/packages/databases.scm

@@ -3006,6 +3006,18 @@ designed for efficient and high-performing database access, adapted into a
 simple and Pythonic domain language.")
     (license license:x11)))
 
+(define-public python-sqlalchemy-1.3
+  (package
+    (inherit python-sqlalchemy)
+    (version "1.3.20")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "SQLAlchemy" version))
+       (sha256
+        (base32 "18b9am7bsqc4nj3d2h5r93i002apczxfvpfpcqbd6f0385zmrwnj"))))
+    (propagated-inputs '())))
+
 (define-public python2-sqlalchemy
   (package-with-python2 python-sqlalchemy))