message: update deno.json and import_map.json after upgrade
diff: @@ -4,6 +4,7 @@ import {
  getLatestVersion,
  } from "../core/utils.ts";
  import { brightGreen, gray } from "../deps/colors.ts";
  +import importMap from "./import_map.ts";
  interface Options {
  dev: boolean;
  @@ -66,5 +67,13 @@ async function install(version: string, dev = false) {
  const status = await process.status();
  process.close();
  + try {
  + Deno.stat("deno.json");
  + Deno.stat("import_map.json");
  + await importMap();
  + } catch {
  + // Don't update import_map.json or deno.json
  + }
  +
  return status.success;
  }
  