Bump R version and update holidays file for release (#2349)

Author: tcuongd

R/DESCRIPTION

@@ -1,7 +1,7 @@
 Package: prophet
 Title: Automatic Forecasting Procedure
-Version: 1.1.1
-Date: 2022-09-09
+Version: 1.1.2
+Date: 2023-01-20
 Authors@R: c(
   person("Sean", "Taylor", email = "sjtz@pm.me", role = c("cre", "aut")),
   person("Ben", "Letham", email = "bletham@fb.com", role = "aut")