Add package migration guide

Author: alies-dev

README.md

@@ -12,9 +12,10 @@ Determine the geographical location and currency of website visitors based on th
 ## About this fork
 
 We have forked [Torann/laravel-geoip](https://github.com/Torann/laravel-geoip) as it’s almost not actively maintained anymore.
-This fork works with modern PHP versions only (8.1+).
+This fork works with modern PHP versions only (8.0+).
 Also, as for any InteractionDesignFoundation project, we are going to improving code quality by using types, static analysers, tests and linters.
-But don’t worry, we are following SemVer 2.0.
+
+But don’t worry, we are following SemVer 2.0. The [package migration is straightforward](./docs/migration.md).
 
 
 ## Installation

docs/migration.md

@@ -0,0 +1,17 @@
+# Migration
+To migrate from `torann/geoip` you simply need to :
+
+1. change your composer.json:
+```diff
+-"torann/geoip": "^3.0",
++"interaction-design-foundation/laravel-geoip": "^3.1",
+```
+
+2. update namespaces in your application:
+```diff
+- use Torann\GeoIP;
+- use Torann\Location;
+
++ use InteractionDesignFoundation\GeoIP;
++ use InteractionDesignFoundation\Location;
+```