Added a comment about format config and enable linter symfony and phpunit plugins

Author: Zuruuh

carthage-software/mago/0.24/mago.toml

@@ -12,11 +12,12 @@ paths = [
 includes = ["vendor"]
 excludes = []
 
+# See https://docs.rs/mago-formatter/latest/mago_formatter/settings/struct.FormatSettings.html
 [format]
 print_width = 120
 tab_width = 4
 use_tabs = false
 
-# [linter]
-# default_plugins = true
-# plugins = ["symfony"]
+[linter]
+default_plugins = true
+plugins = ["symfony", "php-unit"]