Sort the lists in Manifest.to_json.
Sort the lists in Manifest.to_json.

vivliostyle/wpt-tools,UprootStaging/wpt-tools,frewsxcv/wpt-tools,frewsxcv/wpt-tools,kaixinjxq/wpt-tools,vivliostyle/wpt-tools,kaixinjxq/wpt-tools,kaixinjxq/wpt-tools,wpt-on-tv-tf/wpt-tools,wpt-on-tv-tf/wpt-tools,UprootStaging/wpt-tools,frewsxcv/wpt-tools,UprootStaging/wpt-tools,vivliostyle/wpt-tools,wpt-on-tv-tf/wpt-tools