feat(solc): add dependency graph implementation

CHANGELOG.md

@@ -34,6 +34,8 @@
 
 ### Unreleased
 
+- Add dependency graph and resolve all imported libraryfiles
+ [#750](https://github.com/gakonst/ethers-rs/pull/750)
 - `Remapping::find_many` does not return a `Result` anymore
  [#707](https://github.com/gakonst/ethers-rs/pull/707)
 - Add support for hardhat artifacts

ethers-solc/Cargo.toml

@@ -35,6 +35,8 @@ tempdir = { version = "0.3.7", optional = true }
 fs_extra = { version = "1.2.0", optional = true }
 sha2 = { version = "0.9.8", default-features = false }
 dunce = "1.0.2"
+solang-parser = { git = "https://github.com/hyperledger-labs/solang", default-features = false }
+rayon = "1.5.1"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 home = "0.5.3"
@@ -56,6 +58,10 @@ tokio = { version = "1.12.0", features = ["full"] }
 name = "compile_many"
 harness = false
 
+[[bench]]
+name = "read_all"
+harness = false
+
 [[test]]
 name = "project"
 path = "tests/project.rs"