This allows paths that are prefixed with environment variables to behave
as expected. This is useful when scanning the default LV2 locations in
the AudioPluginHost on Windows.

In Windows DLL builds we inject operator new/delete definitions into
classes with a leak detector. This requires that all inheritance from
such classes must be public, and classes inheriting from multiple such
classes must disambiguate between the base's operators.

Before this commit an already started timer would wait until the
previously set tick time before applying the new one. This problem seems
to have affected the Windows implementation only.

The issue affected projects not depending on juce_audio_devices.

Previously, we would allocate storage large enough to fit the entire
contents of the input stream, even if this was lower than the
maxNumBytesToWrite.

Previously, JUCE_ANDROID_REALTIME_THREAD_AVAILABLE sometimes remained
unset, even though JUCE_USE_ANDROID_OBOE was set to its default value.
This is because in this case, JUCE_USE_ANDROID_OBOE is only defined in
juce_audio_basics.h, so it is not visible when compiling juce_core.cpp.

Xcode 14 has minimum deployment targets of macos 10.13 and iOS 11.

This is a breaking change - see BREAKING-CHANGES.txt

While the affected callbacks are cancelled before the referenced
state is deleted, we have had user reports that they can still be
accessed by the cancelled callbacks causing crashes. After only
finding warnings that WinRT AsyncCallback cancellation is not a
guaranteed thing, we saw it best to wrap the pointers.