Unexpected casing when using numbers

[Techassi]

This seems very related to #18.

When converting v1alpha1 to PascalCase, I expect the result to be V1Alpha1, however, V1alpha1 is produced. Adding an API mentioned in #18 (comment) could solve this issue by setting number_starts_word: true.

Is there currently any way to produce the expected outcome, or should this be accepted as intended behaviour?

[gdnathan]

I'd like to add something.
Whatever the final decision is (to keep lowercase after number or not), I think the option to have the other option would be beneficial.
In case of cross language project, it can cause incompatibilities if one camel_case library use one strategy, and an other one use a different one, as seen in this issue