Add shared overload of the EventDriver.events property.

This allows accessing the shared "trigger" method from a shared event driver.

source/eventcore/driver.d

@@ -10,6 +10,7 @@ interface EventDriver {
 	@property EventDriverCore core();
 	@property EventDriverTimers timers();
 	@property EventDriverEvents events();
+	@property shared(EventDriverEvents) events() shared;
 	@property EventDriverSignals signals();
 	@property EventDriverSockets sockets();
 	@property EventDriverDNS dns();

source/eventcore/drivers/libasync.d

@@ -39,6 +39,7 @@ final class LibasyncEventDriver : EventDriver {
 	override @property LibasyncEventDriverDNS dns() { return m_dns; }
 	override @property LibasyncEventDriverTimers timers() { return m_timers; }
 	override @property LibasyncEventDriverEvents events() { return m_events; }
+	override @property shared(LibasyncEventDriverEvents) events() shared { return m_events; }
 	override @property LibasyncEventDriverSignals signals() { return m_signals; }
 	override @property LibasyncEventDriverWatchers watchers() { return m_watchers; }
 

source/eventcore/drivers/posix.d

@@ -91,6 +91,7 @@ final class PosixEventDriver(Loop : PosixEventLoop) : EventDriver {
 	// force overriding these in the (final) sub classes to avoid virtual calls
 	final override @property CoreDriver core() { return m_core; }
 	final override @property EventsDriver events() { return m_events; }
+	final override @property shared(EventsDriver) events() shared { return m_events; }
 	final override @property SignalsDriver signals() { return m_signals; }
 	final override @property TimerDriver timers() { return m_timers; }
 	final override @property SocketsDriver sockets() { return m_sockets; }

source/eventcore/drivers/winapi.d

@@ -46,6 +46,7 @@ final class WinAPIEventDriver : EventDriver {
 	override @property WinAPIEventDriverDNS dns() { return m_dns; }
 	override @property WinAPIEventDriverTimers timers() { return m_timers; }
 	override @property WinAPIEventDriverEvents events() { return m_events; }
+	override @property shared(WinAPIEventDriverEvents) events() shared { return m_events; }
 	override @property WinAPIEventDriverSignals signals() { return m_signals; }
 	override @property WinAPIEventDriverWatchers watchers() { return m_watchers; }