word-count: No-op declare compliance with 1.2.0
word-count: No-op declare compliance with 1.2.0

1.1.0: move inputs to `input` object
https://github.com/exercism/problem-specifications/pull/1081
1.2.0: use camelCase for property name
https://github.com/exercism/problem-specifications/pull/1143

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