Fix plugin name definition

Closes #31, closes #32

Author: nilshoerrmann

composer.json

@@ -3,13 +3,14 @@
     "description": "A color field for Kirby 3",
     "type": "kirby-plugin",
     "license": "MIT",
-    "version": "1.7.0",
+    "version": "1.7.2",
     "authors": [
         {
             "name": "hana+nils · Büro für Gestaltung",
             "email": "[email protected]"
         }
     ],
+    "homepage": "https://github.com/hananils/kirby-colors",
     "support": {
         "issues": "https://github.com/hananils/kirby-colors/issues/"
     },

index.php

@@ -2,7 +2,7 @@
 
 @include_once __DIR__ . '/vendor/autoload.php';
 
-Kirby::plugin('hananils/kirby-colors', [
+Kirby::plugin('hananils/colors', [
     'fields' => [
         'colors' => [
             'props' => [