Update toml dependency to 0.7.x

Cargo.toml

@@ -135,7 +135,7 @@ thiserror = "1.0"
 tokio = "1"
 tokio-tungstenite = "0.17"
 tokio-util = "0.7"
-toml = "0.5"
+toml = "0.7.6"
 tracing = "0.1.35"
 tracing-appender = "0.2.2"
 tracing-bunyan-formatter = "0.3.3"

bin/propolis-standalone/src/config.rs

@@ -55,7 +55,10 @@ pub fn block_backend(
 pub fn parse(path: &str) -> anyhow::Result<Config> {
     let file_data =
         std::fs::read(path).context("Failed to read given config.toml")?;
-    Ok(toml::from_slice::<Config>(&file_data)?)
+    Ok(toml::from_str::<Config>(
+        std::str::from_utf8(&file_data)
+            .context("config should be valid utf-8")?,
+    )?)
 }
 
 pub fn parse_bdf(v: &str) -> Option<Bdf> {

bin/propolis-standalone/src/snapshot.rs

@@ -236,7 +236,10 @@ pub(crate) async fn restore(
         let config_len = file.read_u64().await?;
         let mut config_buf = vec![0; config_len.try_into()?];
         file.read_exact(&mut config_buf).await?;
-        toml::from_slice(&config_buf)?
+        toml::from_str(
+            std::str::from_utf8(&config_buf)
+                .context("config should be valid utf-8")?,
+        )?
     };
 
     // We have enough to create the instance so let's do that first