check uncommitted files in prepublish

package.json

@@ -27,7 +27,7 @@
     "docs": "run-s docs:generate docs:readme",
     "docs:generate": "node node_modules/.bin/ts-docs-gen --entryFile ./src/index.ts",
     "docs:readme": "node .markdown-magic.config.js",
-    "prepublish": "in-publish && npm-run-all lint -p test build:react_example docs -s clean tsc clean:test || not-in-publish",
+    "prepublish": "in-publish && npm-run-all lint -p test build:react_example docs -s clean tsc clean:test uncommitted || not-in-publish",
     "run_example": "yarn --frozen-lockfile && yarn build && yarn --frozen-lockfile --cwd ./examples/react-example && yarn --cwd ./examples/react-example start"
   },
   "repository": {
@@ -105,7 +105,8 @@
     "ts-docs-gen": "^0.2.0",
     "ts-node": "^7.0.0",
     "tslint": "^5.11.0",
-    "typescript": "^2.9.2"
+    "typescript": "^2.9.2",
+    "uncommitted": "^1.0.0"
   },
   "nyc": {
     "extension": [

yarn.lock

@@ -4803,6 +4803,10 @@ ultron@~1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ultron/-/ultron-1.1.1.tgz#9fe1536a10a664a65266a1e3ccf85fd36302bc9c"
 
+uncommitted@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/uncommitted/-/uncommitted-1.0.0.tgz#a93e723023e256db09f04f70bccdaa115042163e"
+
 underscore.string@~2.4.0:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/underscore.string/-/underscore.string-2.4.0.tgz#8cdd8fbac4e2d2ea1e7e2e8097c42f442280f85b"