release: bump to 0.1.8 (fix invalid edition)

Bump version for the authoritative-strategy + session-notification changes.
edition was set to an invalid "2026"; restore to 2021 (rust-version 1.75
predates edition 2024).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -3197,7 +3197,7 @@ checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
 [[package]]
 name = "hello-agent"
-version = "0.1.7"
+version = "0.1.8"
 dependencies = [
  "anyhow",
  "env_logger 0.10.2",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hello-agent"
-version = "0.1.7"
+version = "0.1.8"
 edition = "2021"
 rust-version = "1.75"
 description = "Headless RustDesk-protocol-compatible support agent for Windows"