chore(package): update metalsmith-layouts to version 2.3.0

Closes #32

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
     "metalsmith-feed": "^0.3.0",
     "metalsmith-i18n": "^0.2.0",
     "metalsmith-ignore": "^0.1.2",
-    "metalsmith-layouts": "^1.6.5",
+    "metalsmith-layouts": "^2.3.0",
     "metalsmith-markdown-sections": "^0.3.1",
     "metalsmith-moment": "^1.0.0",
     "metalsmith-multi-language": "^0.2.0",