Fix license discrepancy

addressing #1983

Author: rcorces

DESCRIPTION

@@ -9,7 +9,7 @@ Authors@R: c(
     person("Paulina","Paiz", role = "ctb"))
 Description: This package is designed to streamline scATAC analyses in R.
 Roxygen: list(markdown = TRUE)
-License: GPL (>= 2)
+License: MIT
 LinkingTo: Rcpp, RcppArmadillo
 LazyData: TRUE
 URL: https://www.ArchRProject.com