Method update

src/lib/ticker.ts:20–20

Update the in-place progress line. No-op on non-TTY.

(line: string)

export interface Ticker {
  /** Update the in-place progress line. No-op on non-TTY. */
  update(line: string): void;
  /**
   * Print the final line (with a trailing newline so the prompt
   * doesn't run into the result block). No-op on non-TTY.