Provide ES "module" field in package.json

Also, added other available versions as well [#71]

README.md

@@ -43,16 +43,27 @@ npm install vue2-timepicker --save
 
 ## Get Started
 
-**Step 1:** Import VueTimepicker
+### **Step 1:** Import VueTimepicker
 
-**A:** Include the single file component (Recommended)
+**Option A:** Import component JS and CSS
 
 ```javascript
-// Import the *.vue file (CSS included)
+// Main JS (in UMD format)
 import VueTimepicker from 'vue2-timepicker'
+
+// CSS
+import 'vue2-timepicker/dist/VueTimepicker.css'
 ```
 
-or, **B:** Include distribution files base on your needs
+**Option B:** Import the single file component for SSR Usage
+
+```javascript
+// Import the *.vue file (CSS included)
+// Note the `/sfc` suffix here
+import VueTimepicker from 'vue2-timepicker/sfc'
+```
+
+**Option C:** Choose any bundle version base on your needs
 
 ```javascript
 // JAVASCRIPT
@@ -65,9 +76,12 @@ import VueTimepicker from 'vue2-timepicker/dist/VueTimepicker.umd.min.js'
 
 // CSS
 import 'vue2-timepicker/dist/VueTimepicker.css'
+
+// *.vue (with CSS)
+import VueTimepicker from 'vue2-timepicker/src/vue-timepicker.vue'
 ```
 
-**Step 2**: Include VueTimepicker in your component
+### **Step 2**: Include VueTimepicker in your component
 
 ```javascript
 var yourComponent = new Vue({
@@ -76,7 +90,9 @@ var yourComponent = new Vue({
 })
 ```
 
-**Step 3**: Then, you can introduce the `vue-timepicker` tag anywhere you like in your component's template
+### **Step 3**: Introduce `vue-timepicker` in template
+
+Then, you can introduce the `vue-timepicker` tag anywhere you like in your component's template
 
 ```html
 <vue-timepicker></vue-timepicker>

package.json

@@ -1,15 +1,20 @@
 {
   "name": "vue2-timepicker",
-  "version": "0.2.2",
+  "version": "0.2.2-rc.0",
   "description": "A dropdown time picker (hour|minute|second) for Vue 2.x, with flexible time format support",
   "scripts": {
     "dev": "cd demo && yarn serve",
     "dev:init": "cd demo && yarn install",
     "build": "vue-cli-service build --target lib --name VueTimepicker ./src/index.js",
     "build:demo": "cd demo && yarn build"
   },
-  "main": "src/index.js",
+  "main": "dist/VueTimepicker.umd.js",
+  "module": "dist/VueTimepicker.common.js",
+  "unpkg": "dist/VueTimepicker.umd.min.js",
   "css": "dist/VueTimepicker.css",
+  "browser": {
+    "./sfc": "src/vue-timepicker.vue"
+  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/phoenixwong/vue2-timepicker.git"
@@ -41,7 +46,6 @@
     "dist/*",
     "src/*",
     "*.json",
-    "*.js",
     "*.md"
   ],
   "eslintConfig": {