python-constantly: Update to 23.10.4, add new build dependency

This also adds a test.sh script for the packages feed CI.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

lang/python/python-constantly/test.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+[ "$1" = python3-constantly ] || exit 0
+
+python3 - << 'EOF'
+
+from constantly import NamedConstant, Names
+class Letters(Names):
+    a = NamedConstant()
+    b = NamedConstant()
+    c = NamedConstant()
+
+assert Letters.lookupByName('a') is Letters.a
+assert Letters.a < Letters.b
+assert Letters.b < Letters.c
+assert Letters.a < Letters.c
+
+from constantly import ValueConstant, Values
+class STATUS(Values):
+    OK = ValueConstant('200')
+    FOUND = ValueConstant('302')
+    NOT_FOUND = ValueConstant('404')
+
+assert STATUS.OK.value == '200'
+assert STATUS.lookupByValue('404') == STATUS.NOT_FOUND
+
+EOF