CRAN release v0.31

Author: yihui

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: bookdown
 Type: Package
 Title: Authoring Books and Technical Documents with R Markdown
-Version: 0.30.1
+Version: 0.31
 Authors@R: c(
     person("Yihui", "Xie", role = c("aut", "cre"), email = "xie@yihui.name", comment = c(ORCID = "0000-0003-0645-5666")),
     person("JJ", "Allaire", role = "ctb"),
@@ -87,7 +87,7 @@ Suggests:
 URL: https://github.com/rstudio/bookdown, https://pkgs.rstudio.com/bookdown/
 BugReports: https://github.com/rstudio/bookdown/issues
 SystemRequirements: Pandoc (>= 1.17.2)
-RoxygenNote: 7.2.1
+RoxygenNote: 7.2.3
 Encoding: UTF-8
 Config/Needs/book: remotes, webshot
 Config/Needs/website: pkgdown, tidyverse/tidytemplate, rstudio/quillt