Re-organize and update

[garikbesson]

update dependencies, code structure, tests, README

[gagdiez]

@denbite, please take a look

[denbite]

I've written up more unit tests for better coverage, it's been increased from 69% to 96%
The remaining 4% belong to the ft_resolve_transfer function, which can't be tested properly with unit testing

Before

After

[garikbesson]

I've written up more unit tests for better coverage, it's been increased from 69% to 96% The remaining 4% belong to the ft_resolve_transfer function, which can't be tested properly with unit testing

Before

After

What is that tool on your screens?

[denbite]

@garikbesson https://crates.io/crates/cargo-llvm-cov/0.1.13

[denbite]

• restructured integration tests to make them as deterministic as possible
• improved readability of tests folder
• compiled DeFi contract so we don't have to do it for each test case
• introduced lazy compilation of Fungible Token inside tests to prevent the same contract from being built many times