ci: upgrade gcovr to the latest version

And adjust lcov invocation for lcov 2.1

Change-Id: I9fc71d72bcfc2d9b48e90a221087648c076a6640
diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index bb9d8cc..16f7474 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -32,7 +32,7 @@
 FORMULAE=(boost openssl pkgconf)
 case $JOB_NAME in
     *code-coverage)
-        APT_PKGS+=(lcov)
+        APT_PKGS+=(lcov libjson-xs-perl)
         ;;
     *Docs)
         ;;