v6.6.0

What's Changed

• Add version number to pyproject.toml to make maturin happy by @chennin in #184
• Fix save parse fails on valueless key by @oatmealproblem in #188
• Add empire size graph by @oatmealproblem in #189
  • Note: existing users need to either delete your config.yml or add empire_size_graph to one of tabs in tab_layout (click here for more details on configuring tabs)
  • For new users, the Empire Size graph will be in the Economy tab
• Show war goal details in history ledger by @oatmealproblem in #190
• Fix non-primary war participants not listed in war details by @oatmealproblem in #190

Full Changelog: v6.5.3...v6.6.0