python3-cassandra-driver: update to version 3.8.1

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-python/recipes-devtools/python/python3-cassandra-driver_3.8.1.bb

@@ -0,0 +1,8 @@
+inherit setuptools3
+require python-cassandra-driver.inc
+
+# Requires concurrent which is currently in -misc
+RDEPENDS_${PN} += " \
+    ${PYTHON_PN}-misc \
+    ${PYTHON_PN}-numbers \
+"