Add compatibility with QT_NO_KEYWORDS macro (#104)

The Qt documentation recommends[1] not using Qt keywords in the
public API of Qt libraries, specially the 'signals' and 'slots'
Qt keywords.

Without this, client applications that are compiled with the
'QT_NO_KEYWORDS'[2] macro (or that are compiled in conjunction
with other libraries that also defines the same Qt keywords)
will fail to build.

The 'QT_NO_SIGNALS_SLOTS_KEYWORDS'[1] macro assures that
the library is not using 'signals' and 'slots' Qt keywords,
since it will fail to build when they are used. Useful for
code sanity and for avoiding future pull requests that may
try to use these Qt keywords.

[1] https://doc.qt.io/qt-6/signalsandslots.html#signals-and-slots-in-qt-based-libraries
[2] https://doc.qt.io/qt-6/qtglobal.html#QT_NO_KEYWORDS

Author: dbermond

CMakeLists.txt

@@ -41,6 +41,8 @@ add_library(qhotkey QHotkey/qhotkey.cpp)
 add_library(QHotkey::QHotkey ALIAS qhotkey)
 target_link_libraries(qhotkey PUBLIC Qt${QT_DEFAULT_MAJOR_VERSION}::Core Qt${QT_DEFAULT_MAJOR_VERSION}::Gui)
 
+target_compile_definitions(qhotkey PRIVATE QT_NO_SIGNALS_SLOTS_KEYWORDS)
+
 if(BUILD_SHARED_LIBS)
     target_compile_definitions(qhotkey PRIVATE QHOTKEY_LIBRARY)
     target_compile_definitions(qhotkey PUBLIC QHOTKEY_SHARED)

QHotkey/qhotkey.h

@@ -88,7 +88,7 @@ class QHOTKEY_EXPORT QHotkey : public QObject
 	//! Get the current native shortcut
 	NativeShortcut currentNativeShortcut() const;
 
-public slots:
+public Q_SLOTS:
 	//! @writeAcFn{QHotkey::registered}
 	bool setRegistered(bool registered);
 
@@ -102,7 +102,7 @@ public slots:
 	//! Set this hotkey to a native shortcut
 	bool setNativeShortcut(QHotkey::NativeShortcut nativeShortcut, bool autoRegister = false);
 
-signals:
+Q_SIGNALS:
 	//! Will be emitted if the shortcut is pressed
 	void activated(QPrivateSignal);