Small update to ci container used for coverage

Author: eddelbuettel

ChangeLog

@@ -1,3 +1,7 @@
+2022-05-12  Dirk Eddelbuettel  <edd@debian.org>
+
+	* docker/ci/Dockerfile: Added xml2, also use more r-cran-* binaries
+
 2022-05-12  Marco Colombo <mar.colombo13@gmail.com>
 
 	* vignettes/rmd/Rcpp-FAQ.Rmd: Fixed typo

docker/ci/Dockerfile

@@ -10,10 +10,13 @@ RUN apt-get update \
         && apt-get install -y --no-install-recommends \
                 libcurl4-openssl-dev \
                 libssl-dev \
+                r-cran-covr \
                 r-cran-inline \
                 r-cran-pkgkitten \
+                r-cran-tinytest \
+                r-cran-xml2 \
                 git \
-        && install.r covr rbenchmark tinytest
+        && install.r rbenchmark
 
 ENV _R_CHECK_FORCE_SUGGESTS_ FALSE
 ENV _R_CHECK_TESTS_NLINES_ 0