ci: upgrade gcovr to the latest version

And adjust lcov invocation for lcov 2.1

Change-Id: I0cb932183a386ad004239876412bfa0f694ecece
diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index b94cec8..7cae86c 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -31,7 +31,7 @@
 FORMULAE=(boost openssl pkgconf)
 case $JOB_NAME in
     *code-coverage)
-        APT_PKGS+=(lcov)
+        APT_PKGS+=(lcov libjson-xs-perl)
         ;;
     *Docs)
         APT_PKGS+=(doxygen graphviz)