use get_plane2 introduced by libheif 1.20.2

Author: toge

src/heif.imageio/heifinput.cpp

@@ -390,8 +390,13 @@ HeifInput::read_native_scanline(int subimage, int miplevel, int y, int /*z*/,
 #else
     int ystride = 0;
 #endif
+#if LIBHEIF_NUMERIC_VERSION >= MAKE_LIBHEIF_VERSION(1, 20, 2, 0)
+    const uint8_t* hdata = m_himage.get_plane2(heif_channel_interleaved,
+                                              &ystride);
+#else
     const uint8_t* hdata = m_himage.get_plane(heif_channel_interleaved,
                                               &ystride);
+#endif
     if (!hdata) {
         errorfmt("Unknown read error");
         return false;

src/heif.imageio/heifoutput.cpp

@@ -155,7 +155,11 @@ HeifOutput::write_scanline(int y, int /*z*/, TypeDesc format, const void* data,
 #else
     int hystride = 0;
 #endif
+#if LIBHEIF_NUMERIC_VERSION >= MAKE_LIBHEIF_VERSION(1, 20, 2, 0)
+    uint8_t* hdata = m_himage.get_plane2(heif_channel_interleaved, &hystride);
+#else
     uint8_t* hdata = m_himage.get_plane(heif_channel_interleaved, &hystride);
+#endif
     hdata += hystride * (y - m_spec.y);
     memcpy(hdata, data, hystride);
     return true;