[meta] use in-publish in prepublish

package.json

@@ -30,7 +30,7 @@
     "test": "npm run tests-only",
     "test-compiled": "npm run prepublish && NODE_PATH=./lib mocha --compilers js:babel-register --recursive tests/src",
     "test-all": "npm test && for resolver in ./resolvers/*; do cd $resolver && npm test && cd ../..; done",
-    "prepublish": "npm run build",
+    "prepublish": "not-in-publish || npm run build",
     "coveralls": "nyc report --reporter lcovonly && cat ./coverage/lcov.info | coveralls"
   },
   "repository": {
@@ -74,6 +74,7 @@
     "eslint-module-utils": "file:./utils",
     "eslint-plugin-eslint-plugin": "^2.2.1",
     "eslint-plugin-import": "2.x",
+    "in-publish": "^2.0.0",
     "linklocal": "^2.8.2",
     "mocha": "^3.5.3",
     "nyc": "^11.9.0",