TypeHints
PHPdoc
Use === null instead of is_null (#1855)
Added PHP7 return types to methods according doc block (#1864)
Move anniversary calculations to new service
Refactor surname queries to avoid duplication and improve efficiency
Use lookup table for initial letter digraphs
Move some localization functions to a localization service
Move upgrade logic to service
Fix: #1816 - add housekeeping service
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