Documentation record

Fixes #45

README.md

@@ -241,6 +241,7 @@ Strings that mimic real strings, with words and sentences:
 - `fc.set<T>(arb: Arbitrary<T>): Arbitrary<T[]>`, `fc.set<T>(arb: Arbitrary<T>, maxLength: number): Arbitrary<T[]>` or `fc.set<T>(arb: Arbitrary<T>, minLength: number, maxLength: number): Arbitrary<T[]>` set of random length containing unique values generated by `arb`. All the values in the set are unique given the default `comparator = (a: T, b: T) => a === b` which can be overriden by giving another comparator function as the last argument on previous signatures
 - `fc.tuple<T1,T2,...>(arb1: Arbitrary<T1>, arb2: Arbitrary<T2>, ...): Arbitrary<[T1,T2,...]>` tuple generated by aggregating the values of `arbX` like `generate: () => [arb1.generate(), arb2.generate(), ...]`. This arbitrary perfectly handle shrinks and is able to shink on all the generators
 - `fc.dictionary<T>(keyArb: Arbitrary<string>, valueArb: Arbitrary<T>): Arbitrary<{[Key:string]:T}>` dictionary containing keys generated using `keyArb` and values gneerated by `valueArb`
+- `fc.record<T>(recordModel: {[Key:string]: Arbitrary<T>}): Arbitrary<{[Key:string]: T}>` or `fc.record<T>(recordModel: {[Key:string]: Arbitrary<T>}, constraints: RecordConstraints): Arbitrary<{[Key:string]: T}>` record using the incoming arbitraries to generate its values. It comes very useful when dealing with settings. It takes an optional parameter of type `RecordConstraints` to configure some of its properties. The setting `with_deleted_keys=true` instructs the record generator that it can omit some keys
 
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