doc: add version information to PositiveIntegerValue

Ref: 1c6fd0f#r29675182
jazzband · Jul 11, 2018 · b1d92cf · b1d92cf
1 parent c0ac52f
commit b1d92cf
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/docs/values.rst b/docs/values.rst
@@ -234,6 +234,8 @@ Type values
 
     A :class:`~Value` subclass that handles positive integer values.
 
+    .. versionadded:: 2.1
+
     ::
 
         MYSITE_WORKER_POOL = values.PositiveIntegerValue(8)