Take an input and offset it by a positive or negative value.
interface IOffsetConfig {
offset?: number | string;
}const offsetMapperDefault = Mappers.offset(); // Offset: offset:0
const offsetMapperPositive = Mappers.offset({ offset: 42 }); // Offset: offset:42
const offsetMapperNegative = Mappers.offset({ offset: -42 }); // Offset: offset:-42