fix: support 'always' in 'CanonicalizeHostname'

Closes #11

Author: ObserverOfTime

grammar.js

@@ -378,7 +378,7 @@ module.exports = grammar({
     _canonicalize_hostname: $ => seq(
       keyword('CanonicalizeHostname'),
       $._sep,
-      argument($._boolean)
+      argument(choice('always', $._boolean))
     ),
 
     _canonicalize_max_dots: $ => seq(

queries/highlights.scm

@@ -24,6 +24,8 @@
   "yes" "no"
   "ask" "auto"
   "none" "any"
+  ; CanonicalizeHostname
+  "always"
   ; ControlMaster
   "autoask"
   ; FingerprintHash