Update the version from v4.5 to v4.5.5

A little (big) one for this week too.

I waited for you to check the previous one not to give you too much work! I guess you can check this one this weekend and tell me if there's anything wrong (or merge it otherwise).

I'm on the way for the **v5.0.0**. Maybe for the next week...

Whatever, I try to keep very close to the Harry's repo commits + the way you translated it in LESS. If I'm wrong in any way, please tell me :+1:

*NB: There's a "Trailing Whitespaces Removal" (b2650aa) on this one, just like in the original project, which explains why it is so big.*

Best regards!