Add max_inputs_per_id as argument for ReversibleId#initialize

[avcwisesa]

Summary

• max_inputs_per_id to check length of array provided as input for encode and encode_hex
• set default max_inputs_per_id to 32

Related issue

5

Checklist:

• [x] Updated the documentation accordingly.
• [x] Added tests to cover changes.
• [x] All new and existing tests passed.

[stevegeek]

Can you please also update the RBS?