Make addon context aware for electron 10+

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

src/addon.cpp

@@ -1,9 +1,13 @@
 #include "pcsclite.h"
 #include "cardreader.h"
 
-void init_all(v8::Local<v8::Object> target) {
+NAN_MODULE_INIT(init_all) {
     PCSCLite::init(target);
     CardReader::init(target);
 }
 
+#if NODE_MAJOR_VERSION >= 10
+NAN_MODULE_WORKER_ENABLED(pcsclite, init_all)
+#else
 NODE_MODULE(pcsclite, init_all)
+#endif