♻️ Use composer psr4 autoload

Author: Guido W. Pettinari

composer.json

@@ -9,6 +9,8 @@
         "php": "^7.0"
     },
     "autoload": {
-        "classmap": ["src/"]
+        "psr-4": {
+            "Idearia\\": "src/"
+        }
     }
 }

src/class-config.php renamed to src/Config.php

@@ -5,8 +5,8 @@
 /**
  * Settings API wrapper class
  */
-class SettingsApi {
-
+class SettingsApi
+{
     /**
      * settings sections array
      *