2.7.0

What's Changed

• Update Fronter by @IhateTrains in #343
• Historical regnal numbers by @IhateTrains in #342
• Fix some warnings about possible null by @IhateTrains in #344
• Map hunnic culture and manichaeism religion by @IhateTrains in #352
• ID -> Id by @IhateTrains in #354
• Use unlocalized name for name and adj before giving up by @IhateTrains in #353
• Make Imperator spouses not nullable by @IhateTrains in #355
• Move hunnic to mongolic group by @IhateTrains in #357

Full Changelog: 2.6.1...2.7.0