mod_http2: version bump, partial fix for stream response getting stuck, see...

mod_http2: version bump, partial fix for stream response getting stuck, see https://github.com/icing/mod_h2/issues/143

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1803420 13f79535-47bb-0310-9956-ffa450edef68