Use CamelCase for types, traits and enum variants

[ancazamfir]

Crate

all

Summary

As per title. e.g. cargo +nightly complains with:

error: name `IBCEvent` contains a capitalized acronym
  --> modules/src/events.rs:32:10
   |
32 | pub enum IBCEvent {
   |          ^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `IbcEvent`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms

error: name `ICS18Context` contains a capitalized acronym
  --> modules/src/ics18_relayer/context.rs:15:11
   |
15 | pub trait ICS18Context {
   |           ^^^^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter (notice the capitalization): `Ics18Context`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms

Problem Definition

Not following Rust naming conventions

Proposal

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