add static_framework field in podspec file, fix #13

ios/flutter_ffmpeg.podspec

@@ -10,7 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
-  s.static_framework  = true
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_audio/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_audio_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_full-gpl/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_full-gpl_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_full/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_full_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_https-gpl/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_https-gpl_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_https/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_https_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_min-gpl/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_min-gpl_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_min/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_min_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_video/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'

packages/flutter_ffmpeg_video_lts/ios/flutter_ffmpeg.podspec

@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
 
   s.requires_arc     = true
   s.ios.deployment_target = '9.3'
+  s.static_framework = true
 
   s.source              = { :path => '.' }
   s.source_files        = 'Classes/**/*'