fix build script

Author: gregsdennis

package.json

@@ -6,7 +6,7 @@
   "main": "index.js",
   "scripts": {
     "lint": "eslint build/",
-    "build": "npm run build-core && npm run build-validation build-propertyDependencies",
+    "build": "npm run build-core && npm run build-validation && npm run build-propertyDependencies",
     "build-core": "node build/build.js < jsonschema-core.md > jsonschema-core.html",
     "build-validation": "node build/build.js < jsonschema-validation.md > jsonschema-validation.html",
     "build-propertyDependencies": "node build/build.js < proposals/propertyDependencies.md > proposals/propertyDependencies.html"