Move from fastify-warning to process-warning (#1282)

Signed-off-by: Matteo Collina <hello@matteocollina.com>

Author: mcollina

lib/deprecations.js

@@ -1,6 +1,6 @@
 'use strict'
 
-const warning = require('fastify-warning')()
+const warning = require('process-warning')()
 module.exports = warning
 
 const warnName = 'PinoWarning'

package.json

@@ -103,7 +103,7 @@
   },
   "dependencies": {
     "fast-redact": "^3.0.0",
-    "fastify-warning": "^0.2.0",
+    "process-warning": "^1.0.0",
     "on-exit-leak-free": "^0.2.0",
     "pino-abstract-transport": "v0.5.0",
     "pino-std-serializers": "^4.0.0",