Add --strict argument for cli (#219)

Resolved #218

autocorrect-cli/src/cli.rs

@@ -78,6 +78,13 @@ pub(crate) struct Cli {
         help = "Disable diff background color for diff output."
     )]
     pub no_diff_bg_color: bool,
+
+    #[clap(
+        long,
+        help = "Strict mode will cause warnings to return a non-zero value.",
+        default_value = "false"
+    )]
+    pub strict: bool,
 }
 
 #[derive(Debug, Subcommand, Clone)]

autocorrect-cli/src/lib.rs

@@ -262,6 +262,10 @@ where
                 // Exit with code = 1
                 std::process::exit(1);
             }
+            if cli.strict && _warn_count > 0 {
+                // Exit with code = 1
+                std::process::exit(1);
+            }
         } else if cli.formatter == cli::OutputFormatter::Json {
             log::info!("{}", autocorrect::json::to_lint_results_json(lint_results));
         } else {