publish independent packages

packages/carousel/package.json

 {
   "name": "element-carousel",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "A carousel component for Vue.js.",
   "main": "lib/index.js",
   "keywords": [

packages/date-picker/package.json

 {
   "name": "element-datepicker",
-  "version": "1.2.0",
+  "version": "2.0.0",
   "description": "A datepicker component for Vue.",
   "keywords": [
     "element",

packages/loading/package.json

 {
   "name": "element-loading",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "A loading component for Vue.js.",
   "keywords": [
     "element",

packages/pagination/package.json

 {
   "name": "element-pagination",
-  "version": "1.1.0",
+  "version": "2.0.0",
   "description": "A pagination component for Vue.js.",
   "keywords": [
     "element",

packages/table/package.json

 {
   "name": "element-table",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "A table component for Vue.",
   "keywords": [
     "element",

packages/upload/package.json

 {
   "name": "element-upload",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "A upload component for Vue.js.",
   "keywords": [
     "element",