Add ReturnTypeWillChange
Add #[ReturnTypeWillChange] attribute to suppress deprecation warning… …… (#481) * Add #[ReturnTypeWillChange] attribute to suppress deprecation warnings and fatal error Error occurs on php 7.4 >= * Same in other 4 methods #[\ReturnTypeWillChange] Add #[\ReturnTypeWillChange] in other 4 methods to avoid E_DEPRECATED or E_FATAL (php 7.4 >=)