Update author list to move Peter to middle author

Author: kristinawlai

DESCRIPTION

@@ -3,11 +3,11 @@ Package: serocalculator
 Title: Estimating Infection Rates from Serological Data
 Version: 1.4.0
 Authors@R: c(
-    person("Peter", "Teunis", , "p.teunis@emory.edu", role = c("aut", "cph"),
-           comment = "Author of the method and original code."),
     person("Kristina", "Lai", , "kwlai@ucdavis.edu", role = c("aut", "cre")),
     person("Chris", "Orwa", role = "aut"),
     person("Kwan Ho", "Lee", , "ksjlee@ucdavis.edu", role = "ctb"),
+    person("Peter", "Teunis", , "p.teunis@emory.edu", role = c("aut", "cph"),
+           comment = "Author of the method and original code."),
     person("Kristen", "Aiemjoy", , "kaiemjoy@ucdavis.edu", role = "aut"),
     person("Douglas Ezra", "Morrison", , "demorrison@ucdavis.edu", role = "aut")
   )