Remove leftover code

Update sf

Run tests synchronously

Fix runtime list conversion bug

Update examples

Rename lambda to fp

Migrate to SFDX

Move RecordTransform functionality to CopyFields to make purpose more…

… explicit

Remove reduceType in favour of mapToType, similar to Java Stream. Ren…

…ame Relation to BinaryRelation, to reduce the chance of confusion with SObject relations.

Collection's `mapToDouble` and `mapToDecimal` return DoubleCollection and DecimalCollection, which offer further functions like `sum`, `average` and `filter`.