Change CPAN mirror again - metacpan is a complete backpan-backed mirror

This way the deletion of the usable version of Tree::DAG_Node won't
affect testing

diff --git a/maint/travis-ci_scripts/20_install.bash b/maint/travis-ci_scripts/20_install.bash
index 4962251..c8bd62a 100755 (executable)
--- a/maint/travis-ci_scripts/20_install.bash
+++ b/maint/travis-ci_scripts/20_install.bash
@@ -7,7 +7,7 @@ CPAN_MIRROR=$(echo "$PERL_CPANM_OPT" | grep -oP -- '--mirror\s+\S+' | head -n 1
 if ! [[ "$CPAN_MIRROR" =~ "http://" ]] ; then
   echo_err "Unable to extract primary cpan mirror from PERL_CPANM_OPT - something is wrong"
   echo_err "PERL_CPANM_OPT: $PERL_CPANM_OPT"
-  CPAN_MIRROR="http://cpan.develooper.com/"
+  CPAN_MIRROR="http://cpan.metacpan.org/"
   PERL_CPANM_OPT="$PERL_CPANM_OPT --mirror $CPAN_MIRROR"
   echo_err "Using $CPAN_MIRROR for the time being"
 fi