refactor: rename ios/ source folder to apple/

Author: amgleitman

Diff for: .eslintignore

@@ -4,5 +4,5 @@ Example/android/
 Example/ios/
 screenshots/
 android/
-ios/
+apple/
 src/lib/extract/transform.js

Diff for: RNSVG.podspec

@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.authors           = 'Horcrux Chen'
   s.platforms         = { :osx => "10.14", :ios => "9.0", :tvos => "9.2" }
   s.source            = { :git => 'https://github.com/react-native-community/react-native-svg.git', :tag => "v#{s.version}" }
-  s.source_files      = 'ios/**/*.{h,m}'
+  s.source_files      = 'apple/**/*.{h,m}'
   s.ios.exclude_files = '**/*.macos.{h,m}'
   s.osx.exclude_files = '**/*.ios.{h,m}'
   s.requires_arc      = true