Fix SPM package layout (#827)

* Fix SPM package layout

* Update swiftlint paths

Author: evil159

.circleci/config.yml

@@ -156,7 +156,7 @@ jobs:
           app-dir: example
       - run:
           name: swiftlint
-          working_directory: ios/MapboxMapsFlutter
+          working_directory: ios/mapbox_maps_flutter
           command: HOMEBREW_NO_AUTO_UPDATE=1 brew install swiftlint; swiftlint lint --strict
       - run:
           name: unit test

ios/mapbox_maps_flutter.podspec

@@ -13,7 +13,7 @@ Pod::Spec.new do |s|
   s.author           = { 'Mapbox' => 'mobile@mapbox.com' }
   s.source           = { :path => '.' }
 
-  s.source_files = 'MapboxMapsFlutter/Sources/Classes/**/*'
+  s.source_files = 'mapbox_maps_flutter/Sources/mapbox_maps_flutter/Classes/**/*'
   s.dependency 'Flutter'
   s.platform = :ios, '12.0'