update citation format

.Rbuildignore

@@ -1,6 +1,7 @@
 ^.*\.Rproj$
 ^\.Rproj\.user$
 ^cran-comments\.md$
+^\.DS_Store$
 ^\.gitignore$
 ^\.github$
 ^\.git$

inst/CITATION

@@ -1,9 +1,9 @@
 citHeader("To cite VPdtw in publications use:")
 
-citEntry(entry = "Article",
+bibentry(bibtype = "Article",
   title        = "Variable Penalty Dynamic Time Warping Code for Aligning Mass Spectrometry Chromatograms in {R}",
-  author       = personList(as.person("David Clifford"),
-                   as.person("Glenn Stone")),
+  author       = c(person("David Clifford"),
+                   person("Glenn Stone")),
   journal      = "Journal of Statistical Software",
   year         = "2012",
   volume       = "47",
@@ -18,16 +18,16 @@ citEntry(entry = "Article",
         "URL https://www.jstatsoft.org/v47/i08/.")
 )
 
-citEntry(entry = "Article",
+bibentry(bibtype = "Article",
   title        = "Alignment Using Variable Penalty Dynamic Time Warping",
-  author       = personList(as.person("David Clifford"),
-  		   as.person("Glenn Stone"),
-  		   as.person("Ivan Montoliu"),
-  		   as.person("Serge Rezzi"),
-  		   as.person("Francois-Pierre Martin"),
-  		   as.person("Philippe Guy"),
-  		   as.person("Stephen Bruce"),
-  		   as.person("Sunil Kochhar")),
+  author       = c(person("David Clifford"),
+  		   person("Glenn Stone"),
+  		   person("Ivan Montoliu"),
+  		   person("Serge Rezzi"),
+  		   person("Francois-Pierre Martin"),
+  		   person("Philippe Guy"),
+  		   person("Stephen Bruce"),
+  		   person("Sunil Kochhar")),
   journal      = "Analytical Chemistry",
   year         = "2009",
   volume       = "81",