CB-13772: print version numbers correctly in cordova requirements (#291)

Fixes a bug where "cordova requirements" printed out
[object Object] in place of the version number.
diff --git a/src/cli.js b/src/cli.js
index 2bef360..f24ea01 100644
--- a/src/cli.js
+++ b/src/cli.js
@@ -397,7 +397,7 @@
                     platformCheck.forEach(function (checkItem) {
                         var checkSummary = checkItem.name + ': ' +
                             (checkItem.installed ? 'installed ' : 'not installed ') +
-                            (checkItem.metadata.version || '');
+                            (checkItem.installed ? checkItem.metadata.version.version || checkItem.metadata.version : '');
                         events.emit('log', checkSummary);
                         if (!checkItem.installed) {
                             someChecksFailed = true;