upgrade to JUCE 5.4.3. Remove (probably) unused JUCE modules. Remove VST2 target (it's been end-of-life'd by Steinberg and by JUCE)

modules/juce_gui_basics/commands/juce_ApplicationCommandID.h

@@ -35,7 +35,7 @@ namespace juce
     @see ApplicationCommandInfo, ApplicationCommandManager,
          ApplicationCommandTarget, KeyPressMappingSet
 */
-typedef int CommandID;
+using CommandID = int;
 
 
 //==============================================================================

modules/juce_gui_basics/commands/juce_ApplicationCommandManager.cpp

@@ -185,7 +185,7 @@ bool ApplicationCommandManager::invoke (const ApplicationCommandTarget::Invocati
 {
     // This call isn't thread-safe for use from a non-UI thread without locking the message
     // manager first..
-    jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
+    JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
 
     bool ok = false;
     ApplicationCommandInfo commandInfo (0);

modules/juce_gui_basics/commands/juce_ApplicationCommandManager.h

@@ -102,7 +102,7 @@ public:
         Make sure that you don't delete this if pointers to it are still being used by
         objects such as PopupMenus or Buttons.
     */
-    virtual ~ApplicationCommandManager();
+    ~ApplicationCommandManager() override;
 
     //==============================================================================
     /** Clears the current list of all commands.
@@ -338,7 +338,7 @@ class JUCE_API  ApplicationCommandManagerListener
 public:
     //==============================================================================
     /** Destructor. */
-    virtual ~ApplicationCommandManagerListener()  {}
+    virtual ~ApplicationCommandManagerListener() = default;
 
     /** Called when an app command is about to be invoked. */
     virtual void applicationCommandInvoked (const ApplicationCommandTarget::InvocationInfo&) = 0;

modules/juce_gui_basics/commands/juce_KeyPressMappingSet.h

@@ -108,7 +108,7 @@ public:
     KeyPressMappingSet (const KeyPressMappingSet&);
 
     /** Destructor. */
-    ~KeyPressMappingSet();
+    ~KeyPressMappingSet() override;
 
     //==============================================================================
     ApplicationCommandManager& getCommandManager() const noexcept       { return commandManager; }