Use correct key everywhere for paint properties

Author: evil159

lib/src/style/layer/background_layer.dart

@@ -84,7 +84,7 @@ class BackgroundLayer extends Layer {
           ? (map["paint"]["background-opacity"] as num?)?.toDouble()
           : null,
       backgroundPattern: map["paint"]["background-pattern"] is String?
-          ? map["layout"]["background-pattern"] as String?
+          ? map["paint"]["background-pattern"] as String?
           : null,
     );
   }

lib/src/style/layer/fill_extrusion_layer.dart

@@ -144,7 +144,7 @@ class FillExtrusionLayer extends Layer {
           ? (map["paint"]["fill-extrusion-opacity"] as num?)?.toDouble()
           : null,
       fillExtrusionPattern: map["paint"]["fill-extrusion-pattern"] is String?
-          ? map["layout"]["fill-extrusion-pattern"] as String?
+          ? map["paint"]["fill-extrusion-pattern"] as String?
           : null,
       fillExtrusionTranslate:
           (map["paint"]["fill-extrusion-translate"] as List?)
@@ -161,7 +161,7 @@ class FillExtrusionLayer extends Layer {
                   .contains(map["paint"]["fill-extrusion-translate-anchor"])),
       fillExtrusionVerticalGradient:
           map["paint"]["fill-extrusion-vertical-gradient"] is bool?
-              ? map["layout"]["fill-extrusion-vertical-gradient"] as bool?
+              ? map["paint"]["fill-extrusion-vertical-gradient"] as bool?
               : null,
     );
   }

lib/src/style/layer/fill_layer.dart

@@ -133,7 +133,7 @@ class FillLayer extends Layer {
           ? (map["layout"]["fill-sort-key"] as num?)?.toDouble()
           : null,
       fillAntialias: map["paint"]["fill-antialias"] is bool?
-          ? map["layout"]["fill-antialias"] as bool?
+          ? map["paint"]["fill-antialias"] as bool?
           : null,
       fillColor: (map["paint"]["fill-color"] as List?)?.toRGBAInt(),
       fillOpacity: map["paint"]["fill-opacity"] is num?
@@ -142,7 +142,7 @@ class FillLayer extends Layer {
       fillOutlineColor:
           (map["paint"]["fill-outline-color"] as List?)?.toRGBAInt(),
       fillPattern: map["paint"]["fill-pattern"] is String?
-          ? map["layout"]["fill-pattern"] as String?
+          ? map["paint"]["fill-pattern"] as String?
           : null,
       fillTranslate: (map["paint"]["fill-translate"] as List?)
           ?.map<double?>((e) => e.toDouble())

lib/src/style/layer/line_layer.dart

@@ -235,7 +235,7 @@ class LineLayer extends Layer {
           ? (map["paint"]["line-opacity"] as num?)?.toDouble()
           : null,
       linePattern: map["paint"]["line-pattern"] is String?
-          ? map["layout"]["line-pattern"] as String?
+          ? map["paint"]["line-pattern"] as String?
           : null,
       lineTranslate: (map["paint"]["line-translate"] as List?)
           ?.map<double?>((e) => e.toDouble())