Add missing function type to RandomSeed interface

types/random-seed/index.d.ts

@@ -4,6 +4,7 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 export interface RandomSeed {
+    (range: number): number;
     range(range: number): number;
     random(): number;
     floatBetween(min: number, max: number): number;

types/random-seed/random-seed-tests.ts

@@ -9,6 +9,7 @@ const seed = 'My Secret String Value';
 const rand2 = create(seed);
 
 // API
+rand1(50);
 rand1.addEntropy();
 rand1.random();
 rand1.range(100);