Add backported contextvars

rollo-b2c2 · rollo-b2c2 · commit 85f2a56c78a2 · 2021-04-07T11:12:31.000+01:00
diff --git a/requirements.txt b/requirements.txt
@@ -1 +1,2 @@
 six>=1.7.0,<=1.15.0
+contextvars~=2.4; python_version >= "3.0" and python_version < "3.7"

Original file line number	Diff line number	Diff line change
`@@ -1 +1,2 @@`
`1`	`1`	`six>=1.7.0,<=1.15.0`
	`2`	`+contextvars~=2.4; python_version >= "3.0" and python_version < "3.7"`