Improve default seed initialization

[ST-DDT]

To avoid issues like this #1324 (comment) where the faker instance is initialized by multiple threads in parallel (thus using the same timestamp in the seed)

faker/src/modules/mersenne/index.ts

Line 11 in cc18b22

this.gen.initGenrand(new Date().getTime() % 1000000000);

The seed initialization should either take a more precise time source or add a random element (in the hope that this returns a different value per thread).

[Shinigami92]

So like in

faker/src/faker.ts

Line 243 in cc18b22

seed: number | number[] = Math.ceil(Math.random() * Number.MAX_SAFE_INTEGER)

we could replace it with Math.ceil(Math.random() * Number.MAX_SAFE_INTEGER)

[shraddhafalane]

Would like to work on it

[Shinigami92]

Would like to work on it

@shraddhafalane Go for it