Version 0.19

Released January 30, 2023

• Copyright update 2023
• Added Arkadii Yakovets (@arkid15r) to project collaborators / maintainers - welcome!
• Add supported countries tests #878 (@arkid15r)
• Update tox configuration #881 (@arkid15r)
• Use augmented assignment statements #890 (@arkid15r)
• Clean up timedelta/relativedelta usage #892, #894 (@arkid15r)
• Add Albania initial support #895 (@arkid15r)
• Add Andorra initial support #896 (@arkid15r)
• Add Bahrain initial support #888 (@arkid15r)
• Add Montenegro initial support #897 (@arkid15r)
• Add San Marino initial support #898 (@arkid15r)
• Add Vatican City initial support #904 (@arkid15r)
• Add Monaco holidays #877 (@KJhellico)
• Migrate prophet.hdays countries #887 (@arkid15r)
• Dominican Republic fix Corpus Christi holiday, tests refactoring #906 (@KJhellico)
• Japan: substitute holidays and citizens' holidays calculation #879 (@KJhellico)
• Singapore holidays update #880 (@KJhellico)