randomFloat() does not always return a float

Summary

When using $faker->randomFloat(), sometimes an int is returned.

Versions

Self-enclosed code snippet for reproduction

$faker = Faker\Factory::create();

$value = $faker->randomFloat();

assert(is_float($value));

Expected output

No issues in all cases.

Actual output

Fails randomly.

This can likely be solved by using appropriate return type declarations in next or casting the value to a float before returning it.