Revert "Update a few dependencies"

This reverts commit dfc3d5c.

I ... didn't know I had permissions to push to rust-lang/rustwide:master.

Author: jyn514

Diff for: Cargo.toml

@@ -33,7 +33,7 @@ flate2 = "1"
 tar = "0.4.0"
 percent-encoding = "2.1.0"
 walkdir = "2.2"
-toml = "0.7"
+toml = "0.5"
 fs2 = "0.4.3"
 remove_dir_all = "0.7"
 base64 = "0.13.0"
@@ -42,7 +42,7 @@ thiserror = "1.0.20"
 git2 = "0.14.0"
 
 [target.'cfg(unix)'.dependencies]
-nix = "0.26.0"
+nix = "0.25.0"
 
 [target.'cfg(windows)'.dependencies]
 windows-sys = {version = "0.36.1", features = ["Win32_Foundation", "Win32_System_Threading"]}