alphametics: No-op declare compliance with 1.2.0
alphametics: No-op declare compliance with 1.2.0

Move input to `input` object

https://github.com/exercism/problem-specifications/pull/1035

exercism/xrust,petertseng/exercism-rust,petertseng/exercism-rust,petertseng/exercism-rust,exercism/xrust