fix: add back render to polyline

<script>

import { onMounted, ref, inject } from "vue";

import { onMounted, ref, h, inject } from "vue";

import { remapEvents, propsBinder } from "../utils.js";

import { props, setup as polylineSetup } from "../functions/polyline";

    return { ready };

  },

  render() {

    if (this.ready && this.$slots.default) {

      return h("div", { style: { display: "none" } }, this.$slots.default());

    }

    return null;

  },

};