Add node & npm supported versions in package.json

Minimum supported node version: `4.0`
See: https://github.com/zurb/foundation-sites/pull/9335

Related NPM version: `2.14.2`
See: https://nodejs.org/en/blog/release/v4.0.0/

diff --git a/package.json b/package.json
index 32fde7d037704d794935f71da5cb110195a926b5..361ed6dcba89d36bd64bc14cd77b26083f4deb56 100644 (file)
--- a/package.json
+++ b/package.json
@@ -91,6 +91,10 @@
     "vinyl-source-stream": "^1.1.0",
     "yargs": "^4.2.0"
   },
+  "engines": {
+    "node": ">=4.0",
+    "npm": ">=2.14.2"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/zurb/foundation-sites"