Merge pull request #108 from sajayantony/shiwei

Add Shiwei as maintainer

MAINTAINERS

@@ -1,6 +1,7 @@
 Brandon Mitchell <git@bmitch.net> (@sudo-bmitch)
 Josh Dolitsky <josh@bloodorange.io> (@jdolitsky)
 Ramkumar Chinchani <rchincha@cisco.com> (@rchincha)
+Shiwei Zhang <shizh@microsoft.com> (@shizhMSFT)
 Steve Lasker <steve.lasker@microsoft.com> (@stevelasker)
 Tianon Gravi <admwiggin@gmail.com> (@tianon)
 Vanessa Sochat <vsoch@users.noreply.github.com> (@vsoch)