Jiri maintainer (#3100)

* adds Jiri Peinlich as maintainer

Signed-off-by: Justin Florentine <justin+github@florentine.us>

Co-authored-by: Sally MacFarlane <sally.macfarlane@consensys.net>

MAINTAINERS.md

@@ -16,6 +16,7 @@
 | Fabio Di Fabio   | fab-10           | fab-10           |
 | Gary Schulte     | garyschulte      | GarySchulte      | 
 | Jason Frame      | jframe           | jframe           |
+| Jiri Peinlich    | gezero           | JiriPeinlich     |
 | Joshua Fernandes | joshuafernandes  | joshuafernandes  |
 | Justin Florentine| jflo             | RoboCopsGoneMad  |
 | Lucas Saldanha   | lucassaldanha    | lucassaldanha    |