Title case benchmarks
Title case benchmarks

RESULTS:

```
test cases::titlecase::tests::bench_is_title                                      ... bench:       2,847 ns/iter (+/- 1,637)
test cases::titlecase::tests::bench_title                                         ... bench:       2,693 ns/iter (+/- 1,206)
test cases::titlecase::tests::bench_title_from_snake                              ... bench:       2,172 ns/iter (+/- 649)
```

whatisinternet/Inflector