Changes in version 1.0.0                        

  - Initial release combining six historical brain atlases from
    Pijnenburg et al. (2021) into a single package.
  - Includes: Brodmann (1909), Campbell (1905), Economo & Koskinas
    (1925), Flechsig (1920), Kleist (1934), and Smith (1907).
  - Replaces individual packages: ggsegBrodmann, ggsegCampbell,
    ggsegEconomo, ggsegFlechsig, ggsegKleist, ggsegSmith.