Bump to fuels v0.39.0 (FuelLabs#4391)

## Description
- Bump to `fuels v0.39.0`
- Update CI to use `rustc v.1.68.2` which is needed after bumping
`fuels`.

## Checklist

- [ ] I have linked to any relevant issues.
- [ ] I have commented my code, particularly in hard-to-understand
areas.
- [ ] I have updated the documentation where relevant (API docs, the
reference, and the Sway book).
- [ ] I have added tests that prove my fix is effective or that my
feature works.
- [ ] I have added (or requested a maintainer to add) the necessary
`Breaking*` or `New Feature` labels where relevant.
- [ ] I have done my best to ensure that my PR adheres to [the Fuel Labs
Code Review
Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md).
- [ ] I have requested a review from the relevant team or maintainers.

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ concurrency:
 env:
   CARGO_TERM_COLOR: always
   REGISTRY: ghcr.io
-  RUST_VERSION: 1.67.0
+  RUST_VERSION: 1.68.2
   NIGHTLY_RUST_VERSION: nightly-2023-02-08
 
 jobs:

templates/sway-test-rs/template/Cargo.toml

@@ -7,7 +7,7 @@ authors = ["{{authors}}"]
 license = "Apache-2.0"
 
 [dev-dependencies]
-fuels = { version = "0.37", features = ["fuel-core-lib"] }
+fuels = { version = "0.39", features = ["fuel-core-lib"] }
 tokio = { version = "1.12", features = ["rt", "macros"] }
 
 [[test]]

templates/sway-test-rs/template/tests/harness.rs

@@ -6,7 +6,7 @@ abigen!(Contract(
     abi = "out/debug/{{project-name}}-abi.json"
 ));
 
-async fn get_contract_instance() -> (MyContract, ContractId) {
+async fn get_contract_instance() -> (MyContract<WalletUnlocked>, ContractId) {
     // Launch a local network and deploy the contract
     let mut wallets = launch_custom_provider_and_get_wallets(
         WalletsConfig::new(
@@ -23,10 +23,7 @@ async fn get_contract_instance() -> (MyContract, ContractId) {
     let id = Contract::deploy(
         "./out/debug/{{project-name}}.bin",
         &wallet,
-        TxParameters::default(),
-        StorageConfiguration::with_storage_path(Some(
-            "./out/debug/{{project-name}}-storage_slots.json".to_string(),
-        )),
+        DeployConfiguration::default(),
     )
     .await
     .unwrap();