Noto Sans CJK V2.001
This merge request updates Noto Sans CJK to V2.001 which supports the Japanese new era "Reiwa" at U+32FF. https://blogs.adobe.com/CCJKType/2019/04/source-han-sans-2001.html
I'm going to two more merge requests to pristine-tar and upstream branches.
"Reiwa" will start at 2019-05-01, so I hope this merge request will soon be merged and will be released in Debian buster if possible.