Add adincebic as BCR maintainer (#1594)

Author: adincebic

.bcr/metadata.template.json

@@ -20,6 +20,11 @@
             "email": "aaronsky@skyaaron.com",
             "github": "aaronsky",
             "name": "Aaron Sky"
+        },
+        {
+          "email": "cebic.ad@gmail.com",
+          "github": "adincebic",
+          "name": "Adin Cebic"
         }
     ],
     "repository": [