upd

binding.gyp

@@ -2,7 +2,20 @@
   "targets": [
     {
       "target_name": "mojave-permissions",
-      "sources": [ "index.mm" ],
+      'conditions': [
+        ['OS=="mac"', {
+          'sources': [
+            'index.mm'
+          ],
+          'xcode_settings': {
+            'CLANG_CXX_LIBRARY': 'libc++',
+            'MACOSX_DEPLOYMENT_TARGET': '10.14',
+            'OTHER_CFLAGS': [
+                '-ObjC++'
+            ]
+          }
+        }]
+      ],
       "libraries": [ "-framework AVFoundation" ]
     }
   ]

index.mm

@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <uv.h>
+#include <string>
 
 #import <AVFoundation/AVFoundation.h>