Call AuthorizeAndPlayURI on main thread (#221)

* fix: call a`AuthorizeAndPlayURI` on main thread which internally calls `UIAppliation.openURL`

* set min supported iOS version to 12.0

* fix the indentation

ios/Classes/SwiftSpotifySdkPlugin.swift

@@ -366,13 +366,13 @@ public class SwiftSpotifySdkPlugin: NSObject, FlutterPlugin {
         if accessToken != nil {
             appRemote?.connect()
         } else {
-          let appRemote = self.appRemote
-          Task {
-            // Note: A blank string will play the user's last song or pick a random one.
-            if await appRemote?.authorizeAndPlayURI(spotifyUri, asRadio: asRadio ?? false, additionalScopes: scopes) == false {
-              throw SpotifyError.spotifyNotInstalledError
+          // Note: A blank string will play the user's last song or pick a random one.
+          self.appRemote?.authorizeAndPlayURI(spotifyUri, asRadio: asRadio ?? false, additionalScopes: scopes) { success in
+            if (!success) {
+              self.connectionStatusHandler?.connectionResult?(FlutterError(code: "spotifyNotInstalled", message: "Spotify app is not installed", details: nil))
             }
           }
+        }
     }
 }
 

ios/spotify_sdk.podspec

@@ -15,8 +15,8 @@ Unofficial Spotify Flutter SDK.
   s.source           = { :path => '.' }
   s.source_files = 'Classes/**/*'
   s.dependency 'Flutter'
-  s.platform = :ios, '9.0'
-  s.ios.deployment_target = '9.0'
+  s.platform = :ios, '12.0'
+  s.ios.deployment_target = '12.0'
   # Flutter.framework does not contain a i386 slice. Only x86_64 simulators are supported.
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'VALID_ARCHS[sdk=iphonesimulator*]' => 'x86_64' }
   s.swift_version = '5.0'