[file_selector_web] Add dummy ios directory. (flutter#3416)

This is required so the plugin is publishable.

Author: ditman

packages/file_selector/file_selector_web/CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.7.0+1
+
+- Add dummy `ios` dir, so flutter sdk can be lower than 1.20
+
 # 0.7.0
 
 - Initial open-source release.

packages/file_selector/file_selector_web/ios/file_selector_web.podspec

@@ -0,0 +1,21 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html
+#
+Pod::Spec.new do |s|
+    s.name             = 'file_selector_web'
+    s.version          = '0.0.1'
+    s.summary          = 'No-op implementation of file_selector_web web plugin to avoid build issues on iOS'
+    s.description      = <<-DESC
+  temp fake file_selector_web plugin
+                         DESC
+    s.homepage         = 'https://github.com/flutter/plugins/tree/master/packages/file_selector/file_selector_web'
+    s.license          = { :file => '../LICENSE' }
+    s.author           = { 'Flutter Team' => '[email protected]' }
+    s.source           = { :path => '.' }
+    s.source_files = 'Classes/**/*'
+    s.public_header_files = 'Classes/**/*.h'
+    s.dependency 'Flutter'
+  
+    s.ios.deployment_target = '8.0'
+  end
+  

packages/file_selector/file_selector_web/pubspec.yaml

@@ -1,7 +1,7 @@
 name: file_selector_web
 description: Web platform implementation of file_selector
 homepage: https://github.com/flutter/plugins/tree/master/packages/file_selector/file_selector_web
-version: 0.7.0
+version: 0.7.0+1
 
 flutter:
   plugin: