chore: bump pinned localstack tag to 4.5 (#363)

Default `localstack` tag 3.0 was quite outdated, 
causing S3 `put_object` operations to fail with recent versions of the
AWS CLI.

Updating to the latest stable tag, 4.5, resolves the issue.

Author: kairsas

src/localstack/mod.rs

@@ -5,12 +5,12 @@ use testcontainers::{core::WaitFor, Image};
 pub mod pro;
 
 const NAME: &str = "localstack/localstack";
-const TAG: &str = "3.0";
+const TAG: &str = "4.5";
 const DEFAULT_WAIT: u64 = 3000;
 
 /// This module provides [LocalStack](https://www.localstack.cloud/) (Community Edition).
 ///
-/// Currently pinned to [version `3.0`](https://hub.docker.com/layers/localstack/localstack/3.0/images/sha256-73698e485240939490134aadd7e429ac87ff068cd5ad09f5de8ccb76727c13e1?context=explore)
+/// Currently pinned to [version `4.5`](https://hub.docker.com/layers/localstack/localstack/4.5/images/sha256-acc5bf76bd8542897e6326c82f737a980791b998e4d641bcd1560902938ac305?context=explore)
 ///
 /// # Configuration
 ///

src/localstack/pro.rs

@@ -6,7 +6,7 @@ const NAME: &str = "localstack/localstack-pro";
 
 /// This module provides [LocalStack](https://www.localstack.cloud/) (Pro Edition).
 ///
-/// Currently pinned to [version `3.0`](https://hub.docker.com/layers/localstack/localstack-pro/3.0/images/sha256-4d9167a049a705b0edafb9e0a6e362aaf5f9d890cebb894dd9113b17eed83153?context=explore)
+/// Currently pinned to [version `4.5`](https://hub.docker.com/layers/localstack/localstack/4.5/images/sha256-acc5bf76bd8542897e6326c82f737a980791b998e4d641bcd1560902938ac305?context=explore)
 ///
 /// # Configuration
 ///