Update some configs

Author: Billy He

build/flowtip.js lib/flowtip.jsbuild/flowtip.js renamed to lib/flowtip.js

@@ -2,7 +2,7 @@
   "name": "flowtip",
   "version": "2.0.0",
   "description": "A flexible, adaptable and easy to use tooltip positioning library.",
-  "main": "build/flowtip.js",
+  "main": "lib/flowtip.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/qiushihe/flowtip.git"
@@ -14,7 +14,6 @@
   ],
   "author": "Billy He <qiushihe@me.com>",
   "license": "MIT",
-  "private": true,
   "bugs": {
     "url": "https://github.com/qiushihe/flowtip/issues"
   },

package.json

@@ -4,7 +4,7 @@ import WebpackNotifierPlugin from "webpack-notifier";
 const config = {
   entry: path.resolve(__dirname, "src/flowtip.js"),
   output: {
-    path: path.resolve(__dirname, "build"),
+    path: path.resolve(__dirname, "lib"),
     filename: "flowtip.js",
     library: "flowtip",
     libraryTarget: "umd"