add citation and bump dev version (1.1.9)

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: ggkegg
 Type: Package
 Title: KEGG pathway visualization by ggplot2
-Version: 1.1.8
+Version: 1.1.9
 Authors@R: person("Noriaki", "Sato", email = "nori@hgc.jp", role = c("cre", "aut"))
 Description: This package aims to import, parse, and analyze KEGG data such as KEGG PATHWAY and KEGG MODULE. The package supports visualizing KEGG information using ggplot2 and ggraph through using the grammar of graphics. The package enables the direct visualization of the results from various omics analysis packages.
 License: MIT + file LICENSE

inst/CITATION

@@ -0,0 +1,20 @@
+citEntry(entry  ="ARTICLE",
+         title  = "ggkegg: analysis and visualization of KEGG data utilizing the grammar of graphics",
+         author = personList(
+             as.person("Noriaki Sato"),
+             as.person("Miho Uematsu"),
+             as.person("Kosuke Fujimoto"),
+             as.person("Satoshi Uematsu"),
+             as.person("Seiya Imoto")
+             ),
+         journal = "Bioinformatics",
+         year    = "2023",
+         volume  = "39",
+         number  = "10",
+         pages   = "btad622",
+         PMID    = "37846038",
+         doi     = "10.1093/bioinformatics/btad622",
+         textVersion = paste("Sato N, Uematsu M, Fujimoto K, Uematsu S, Imoto S.",
+                             "ggkegg: analysis and visualization of KEGG data utilizing the grammar of graphics.", 
+                             "Bioinformatics. 2023 Oct 3;39(10):btad622.")
+         )