fix(package): remove publishConfig entry

Author: bbartolome

package.json

@@ -17,9 +17,6 @@
     "analyze": "plato -d analysis index.js ./lib/index.js ./lib/registrars/*.js ./lib/api/*.js",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },
-  "publishConfig": {
-    "tag": "next"
-  },
   "config": {
     "ghooks": {
       "pre-commit": "npm run lint",
@@ -50,7 +47,7 @@
   },
   "homepage": "https://eq8.js.org",
   "engines": {
-    "node": ">=4.5.0",
+    "node": ">=6",
     "npm": ">=2.15.9 <3.0.0"
   },
   "dependencies": {