Simplify build script for publishing

Author: cbetta

package.json

@@ -7,8 +7,7 @@
     "prebuild": "npm run lint:src & npm run docs",
     "build": "babel -d lib src/ -s inline",
     "build:watch": "watch 'npm run build' src",
-    "prepare": "npm run build",
-    "prepublishOnly": "npm run build",
+    "prepublishOnly": "babel -d lib src/ -s inline",
     "pretest": "eslint spec",
     "test": "jest spec --coverage --collectCoverageFrom=src/**/*.js",
     "test:watch": "watch 'npm test' src spec",