getVersions function Null safety

Future<VersionManifest> getVersions()

Returns a Manifest with all Minecraft: Java Edition Versions, including alpha/beta and snapshot versions.

Implementation

Future<VersionManifest> getVersions() async {
  final response = await request(
      http.get, _launcherMetaApi, 'mc/game/version_manifest_v2.json');
  final data = parseResponseMap(response);
  return VersionManifest.fromJson(data);
}