Resolve all implicit any

[ghetolay]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

I'm using noImplicitAny and this was annoying me, dunno if you are interested.
I've used a lot of any because I didn't know what type to use but at least they're explicit :)

I've only updated src not demo.

[amcdnl]

This is great! Can you rebase and I'll drop it in!