update maintainer

Author: tonywu1999

DESCRIPTION

@@ -1,10 +1,10 @@
 Package: MSstatsConvert
 Title: Import Data from Various Mass Spectrometry Signal Processing Tools to MSstats Format
-Version: 1.21.0
+Version: 1.21.1
 Authors@R: c(
-  person("Mateusz", "Staniak", email = "mtst@mstaniak.pl", role = c("aut","cre")),
+  person("Mateusz", "Staniak", email = "mtst@mstaniak.pl", role = "aut"),
   person("Devon", "Kohler", email = "kohler.d@northeastern.edu", role = "aut"),
-  person("Anthony", "Wu", email = "wu.anthon@northeastern.edu", role = "aut"),
+  person("Anthony", "Wu", email = "wu.anthon@northeastern.edu", role = c("aut", "cre")),
   person("Meena", "Choi", email = "mnchoi67@gmail.com", role = "aut"),
   person("Ting", "Huang", email = "thuang0703@gmail.com", role = "aut"),
   person("Olga", "Vitek", , email = "o.vitek@northeastern.edu", role = "aut"))