Change the default value of iOS Resolver setting

Change the default value of "Link Framework statically" in iOS Resolver
settings to TRUE since it is very likely that some pod frameworks
includes pre-built static libraries, and can cause unexpected crash
in runtime if the app is build with with multiple targets
(Unity 2019.3+).

Author: chkuang-g

source/IOSResolver/src/IOSResolver.cs

@@ -1032,7 +1032,7 @@ public static bool PodfileAddUseFrameworks {
     /// </summary>
     public static bool PodfileStaticLinkFrameworks {
         get { return settings.GetBool(PREFERENCE_PODFILE_STATIC_LINK_FRAMEWORKS,
-                                    defaultValue: false); }
+                                    defaultValue: true); }
         set {
             settings.SetBool(PREFERENCE_PODFILE_STATIC_LINK_FRAMEWORKS, value);
         }

source/IOSResolver/src/IOSResolverSettingsDialog.cs

@@ -222,6 +222,8 @@ public void OnGUI() {
                 settings.podfileStaticLinkFrameworks =
                     EditorGUILayout.Toggle(settings.podfileStaticLinkFrameworks);
                 GUILayout.EndHorizontal();
+                GUILayout.Label("Link frameworks statically is recommended just in case any pod " +
+                                "framework includes static libraries.");
             }
 
             if (IOSResolver.MultipleXcodeTargetsSupported) {