Unified dependencies

[DariuszDepta]

Dependencies between crates in packages directory are moved up to the workspace Cargo.toml.
This makes the maintenenace of dependencies easier, as they are placed in one file, like this:

[workspace.dependencies]
cosmwasm-core = { path = "./packages/core" }
cosmwasm-crypto = { path = "./packages/crypto" }
cosmwasm-derive = { path = "./packages/derive" }
cosmwasm-schema = { path = "./packages/schema" }
cosmwasm-schema-derive = { path = "./packages/schema-derive" }
cosmwasm-std = { path = "./packages/std", default-features = false }
cosmwasm-vm = { path = "./packages/vm" }
cosmwasm-vm-derive = { path = "./packages/vm-derive" }
cw-schema = { path = "./packages/cw-schema" }
cw-schema-derive = { path = "./packages/cw-schema-derive" }

P.S. To check which features are efectively used during dependency compilation use the following command:

$ cargo tree -e features

This PR was checked for dependency identity in the follwoing way:

• on the main branch:

  $ git checkout main
  $ cargo tree -e features > a.txt

• on the unified-dependencies branch:

  $ git checkout unified-dependencies
  $ cargo tree -e features > b.txt

$ diff -s a.txt b.txt

Output:

Files a.txt and b.txt are identical

[pinosu]

Really nice! LGTM 💯