lume upgrade should run lume import-map automatically

[oscarotero]

Running lume upgrade should update the import_map.json and deno.json files automatically if they are available in the current working directory.

In theory this should work but I doesn't:

lume/cli/upgrade.ts

Lines 46 to 54 in f4f2cbb

	try {
	await Promise.all([
	Deno.stat("deno.json"),
	Deno.stat("import_map.json"),
	]);
	await importMap(url);
	} catch {
	// Don't update import_map.json or deno.json
	}