refactor(async): migrate from blocking HTTP to async/await with tokio

Replace reqwest::blocking with async reqwest across the entire codebase.
All command execute functions, registry API calls (packagist, downloader,
resolver, lockfile), and the main entry point now use async/await with
the tokio runtime. The pubgrub resolver runs on spawn_blocking since its
DependencyProvider trait is synchronous, using Handle::block_on for
async I/O within that context.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 9d0691a..58ad592 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ flate2 = "1"
 md5 = "0.7"
 pubgrub = "0.3.0"
 regex = "1.12.3"
-reqwest = { version = "0.13.2", features = ["blocking", "json"] }
+reqwest = { version = "0.13.2", features = ["json"] }
 self-replace = "1"
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.149"