feat: add usePublicApi

src/composition/use-public-api.ts

@@ -0,0 +1,7 @@
+import { getCurrentInstance } from 'vue';
+
+// expose public api
+export function usePublicApi(apis: Record<string, any>) {
+  const vm = (getCurrentInstance() as any).ctx;
+  Object.assign(vm, apis);
+}