List of Rust Kata to Update to 1.49

Rust 1.49 was added, but the following kata are not compatible. Please help updating them.

This is most likely because rand changed gen_range(a, b) to gen_range(a..b).

1. BECOME IMMORTAL
2. Cafeteria
3. N Linear
4. Operations on sequences
5. [Range of Integers in an Unsorted String](https://www.codewars.com/kata/5b6b67a5ecd0979e5b00000e/rus
6. Simple Fun #132: Number Of Carries
7. Weigh The List #1