feat: allow Text as VClick's top-level child (#1214)

[kermanx]

fix #1214

This PR wraps VClick's top-level text node child into a span, or other element specified by the wrapText prop.

Now, the following click animations work properly.

<v-click> 123 </v-click>

<v-click :wrap-text="v=>h('div', v)">
0 <del>2</del>
</v-click>

abcd <v-click>_d_ ef</v-click> ghi <v-click>j**kl**</v-click>