feat(composer): declare replacement of picocms/pico

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "picocms/pico",
+    "name": "seacms/pico",
     "type": "library",
     "description": "Pico is a flat file CMS, this means there is no administration backend and database to deal with. You simply create .md files in the \"content\" folder and that becomes a page.",
     "keywords": ["pico", "picocms", "pico-cms", "simple", "flat-file", "cms", "content-management", "website", "markdown-to-html", "php", "markdown", "yaml", "twig" ],
@@ -38,6 +38,9 @@
         "erusev/parsedown": "1.7.4",
         "erusev/parsedown-extra": "0.8.1"
     },
+    "replace": {
+        "picocms/pico": "3.0.0-alpha.2"
+    },
     "suggest": {
         "picocms/pico-theme": "Pico requires a theme to actually display the contents of your website. This is Pico's official default theme.",
         "picocms/pico-deprecated": "PicoDeprecated's purpose is to maintain backward compatibility to older versions of Pico.",