chore(): Added OSX sierra to list of release info.

Author: jthoms1

lib/info.js

@@ -18,6 +18,9 @@ Info.getMacInfo = function getMacInfo() {
   // What version of Xcode
   var macVersion = 'El Capitan';
   switch (os.release().split('.')[0]) {
+  case '16':
+    macVersion = 'Sierra';
+    break;
   case '15':
     macVersion = 'El Capitan';
     break;