message: fix the task execute
diff: @@ -131,7 +131,7 @@ class InstallTask extends AbstractTask<Version>{
  execute(context: Task.Context): Promise<Version> {
  const { type, versionMeta, minecraft, option } = this;
  return context.execute(new DownloadVersion(type, versionMeta, minecraft, option ? option.checksum : undefined))
  - .then(ver => type === 'client' ? Version.checkDependency(ver, minecraft, option) : ver)
  + .then(ver => type === 'client' ? context.execute(new CheckDependencies(ver, minecraft, option)) : ver)
  }
  constructor(readonly type: string, readonly versionMeta: VersionMeta,
  readonly minecraft: MinecraftLocation,
  