feat: flag and config to skip notifications by jlucktay (#5)

* feat: flag and config to skip notifications

At the end of a run, topgrade normally sends a system notification.
This change adds a command-line flag and a config-file option to
disable this behaviour.

* fix: clippy issues

Also derive Eq where PartialEq is being derived.
https://rust-lang.github.io/rust-clippy/master/index.html#derive_partial_eq_without_eq

Authored-by: James Lucktaylor <jlucktay+github@gmail.com>
Approved-by: Thomas Schönauer <t.schoenauer@hgs-wt.at>

src/main.rs

@@ -466,13 +466,17 @@ fn run() -> Result<()> {
     }
 
     let failed = post_command_failed || runner.report().data().iter().any(|(_, result)| result.failed());
-    terminal::notify_desktop(
-        format!(
-            "Topgrade finished {}",
-            if failed { "with errors" } else { "successfully" }
-        ),
-        None,
-    );
+
+    if !config.skip_notify() {
+        terminal::notify_desktop(
+            format!(
+                "Topgrade finished {}",
+                if failed { "with errors" } else { "successfully" }
+            ),
+            None,
+        );
+    }
+
     if failed {
         Err(StepFailed.into())
     } else {