fix: init_wildduck_transaction in index, in case hook_mail not run (#33)

* init_wildduck_transaction in index, in case hook_mail not run

There's no guarantee that hook_mail will get run. If some other Haraka plugin runs on hook_mail before wildduck and calls `next(OK)`, then wildduck's hook_mail won't ever get called. That crashes the plugin in the recipient handler that does this: `const { recipients, forwards, users } = txn.notes.targets;`.

Additionally:

- add @haraka/eslint-config (which brings in Haraka globals)
- use shorter logging syntax
-

* preserve arity of real_rcpt_handler

.eslintrc

@@ -1,9 +1,10 @@
 {
     "rules": {
-        "no-await-in-loop": 0
+        "no-await-in-loop": 0,
+        "prefer-const": 1,
     },
-    "extends": ["nodemailer", "prettier"],
+    "extends": ["nodemailer", "prettier", "@haraka"],
     "parserOptions": {
-        "ecmaVersion": 2020
+        "ecmaVersion": 2022
     }
 }