ci: upgrade gcovr to the latest version

And adjust lcov invocation for lcov 2.1

Change-Id: I03156b21f2675e105a2a994d2b5f41ceecc490ec
diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index 224edc6..8ca9714 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -30,7 +30,7 @@
 FORMULAE=(boost openssl pkgconf)
 case $JOB_NAME in
     *code-coverage)
-        APT_PKGS+=(lcov)
+        APT_PKGS+=(lcov libjson-xs-perl)
         ;;
     *Docs)
         APT_PKGS+=(doxygen graphviz)