Note ao rodar o devtools check

[beatrizmilz]

❯ checking R code for possible problems ... NOTE
  Found if() conditions comparing class() to string:
  File ‘munifacil/R/limpar_colunas.R’: if (class(expr_col_uf) == "character" | class(expr_col_muni) == "character") ...
  File ‘munifacil/R/limpar_colunas.R’: if (class(expr_col_uf) == "name") ...
  File ‘munifacil/R/limpar_colunas.R’: if (class(expr_col_muni) == "name") ...
  Use inherits() (or maybe is()) instead.