Change sluggable implementation

composer.json

@@ -6,6 +6,7 @@
     "type": "project",
     "require": {
         "php": ">=7.1.0",
+        "cviebrock/eloquent-sluggable": "^4.2",
         "ezyang/htmlpurifier": "~4.6",
         "guzzlehttp/guzzle": "~6.0",
         "indieauth/client": "~0.1",
@@ -18,7 +19,6 @@
         "lcobucci/jwt": "^3.1",
         "league/commonmark": "^0.15.0",
         "league/flysystem-aws-s3-v3": "^1.0",
-        "martinbean/laravel-sluggable-trait": "0.2.*",
         "mf2/mf2": "~0.3",
         "phaza/laravel-postgis": "~3.1",
         "pmatseykanets/laravel-scout-postgres": "^0.5.0",