message: [improvement] support PascalCase component tag name
diff: import '../locale';
  import bem from '../mixins/bem';
  import i18n from '../mixins/i18n';
  -import { isDef } from '.';
  +import { isDef, camelize } from '.';
  function install(Vue) {
  - Vue.component(this.name, this);
  + const { name } = this;
  + Vue.component(name, this);
  + Vue.component((camelize(`-${name}`)), this);
  }
  function returnArray() {
  