published on CRAN geobr v1.2

added geobr_logo_b.svg to .Rbuildignore

Former-commit-id: e00100b

Update README.md

Former-commit-id: 0e0987c
Former-commit-id: b9d0222

manual update

Former-commit-id: b647a21 [formerly 52f9520]
Former-commit-id: 7f72f37

Update README.md

Former-commit-id: 91c75e7 [formerly 43a8f23]
Former-commit-id: e275161

add clean_states to prep_historical_state_muni_1872_1991.R

Former-commit-id: c9b9526 [formerly a87a09f]
Former-commit-id: af787fd