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_events/timers/juce_Timer.cpp

@@ -28,7 +28,7 @@ class Timer::TimerThread  : private Thread,
                             private AsyncUpdater
 {
 public:
-    typedef CriticalSection LockType; // (mysteriously, using a SpinLock here causes problems on some XP machines..)
+    using LockType = CriticalSection; // (mysteriously, using a SpinLock here causes problems on some XP machines..)
 
     TimerThread()  : Thread ("JUCE Timer")
     {
@@ -36,7 +36,7 @@ public:
         triggerAsyncUpdate();
     }
 
-    ~TimerThread() noexcept
+    ~TimerThread() override
     {
         signalThreadShouldExit();
         callbackArrived.signal();
@@ -324,7 +324,7 @@ void Timer::startTimer (int interval) noexcept
 {
     // If you're calling this before (or after) the MessageManager is
     // running, then you're not going to get any timer callbacks!
-    jassert (MessageManager::getInstanceWithoutCreating() != nullptr);
+    JUCE_ASSERT_MESSAGE_MANAGER_EXISTS
 
     const TimerThread::LockType::ScopedLockType sl (TimerThread::lock);