Add me to the CODEOWNERS

Added myself to fpm, json, openssl and main. I have contributed or was
looking to various parts in main even though I don't know every single
file there. Happy to maintain it though.

Author: bukka

CODEOWNERS

@@ -17,12 +17,16 @@
 /ext/ffi @dstogov
 /ext/gmp @Girgias
 /ext/imap @Girgias
+/ext/json @bukka
 /ext/opcache @dstogov @iluuu1994
+/ext/openssl @bukka
 /ext/pgsql @devnexen
 /ext/random @TimWolla
 /ext/session @Girgias
 /ext/sockets @devnexen
 /ext/spl @Girgias
+/main @bukka
+/sapi/fpm @bukka
 /Zend @iluuu1994
 /Zend/Optimizer @dstogov
 /Zend/zend.* @dstogov