add prepare script

Author: etpinard

package.json

@@ -17,6 +17,7 @@
     "make:dist": "mkdirp dist && browserify src/factory.js -o ./dist/create-plotly-component.js -t [ babelify --presets [ es2015 react ] --plugins add-module-exports ] -t browserify-global-shim --standalone createPlotlyComponent && uglifyjs ./dist/create-plotly-component.js --compress --mangle --output ./dist/create-plotly-component.min.js --source-map filename=dist/create-plotly-component.min.js.map",
     "clean": "rimraf lib dist react-plotly.js react-plotly.js.map factory.js factory.js.map",
     "prepublishOnly": "npm run clean && npm run make:lib && npm run make:dist",
+    "prepare": "npm run clean && npm run make:lib && npm run make:dist",
     "lint": "prettier --trailing-comma es5 --write \"src/**/*.js\" && eslint src",
     "test": "npm run lint && npm run deps && jest",
     "watch-test": "jest --watch",