Support Node v20

[travispaul]

Installing with the latest Node.js LTS (20.12.2) appears to fail. Trying again with the older LTS (18.20.2) succeeds.

npm ERR! code 1
npm ERR! path C:\npm\prefix\node_modules\os-service
npm ERR! command failed
npm ERR! command C:\Windows\system32\cmd.exe /d /s /c node-gyp rebuild
npm ERR! Building the projects in this solution one at a time. To enable parallel build, please add the "-m" switch.
npm ERR!   service.cc
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan_callbacks.h(55,23): error C2039: 'AccessorSignature': is not a member of 'v8' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8.h(71): message : see declaration of 'v8' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan_callbacks.h(55,40): error C2065: 'AccessorSignature': undeclared identifier [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan_callbacks.h(55,13): error C2923: 'v8::Local': 'AccessorSignature' is not a valid template type argument for parameter 'T' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan_callbacks.h(55): message : see declaration of 'AccessorSignature' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan_callbacks.h(55,42): error C2955: 'v8::Local': use of class template requires template argument list [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8-local-handle.h(190): message : see declaration of 'v8::Local' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2516,14): error C2955: 'v8::Local': use of class template requires template argument list [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8-local-handle.h(190): message : see declaration of 'v8::Local' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2516,34): error C2641: cannot deduce template arguments for 'v8::Local' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2516,36): error C2780: 'v8::Local<T> v8::Local(T *)': expects 1 arguments - 0 provided [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8-local-handle.h(331): message : see declaration of 'v8::Local' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2516,36): error C2780: 'v8::Local<T> v8::Local(v8::Local<S>)': expects 1 arguments - 0 provided [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8-local-handle.h(195): message : see declaration of 'v8::Local' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2516,34): error C2783: 'v8::Local<T> v8::Local(void)': could not deduce template argument for 'T' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8-local-handle.h(192): message : see declaration of 'v8::Local' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2516,36): error C2780: 'v8::Local<T> v8::Local(v8::Local<T>)': expects 1 arguments - 0 provided [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8-local-handle.h(190): message : see declaration of 'v8::Local' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2542,6): error C2664: 'void v8::ObjectTemplate::SetAccessor(v8::Local<v8::String>,v8::AccessorGetterCallback,v8::AccessorSetterCallback,v8::Local<v8::Value>,v8::AccessControl,v8::PropertyAttribute,v8::SideEffectType,v8::SideEffectType)': cannot convert argument 2 from 'Nan::imp::NativeGetter' to 'v8::AccessorGetterCallback' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\npm\prefix\node_modules\os-service\node_modules\nan\nan.h(2544,7): message : This conversion requires a reinterpret_cast, a C-style cast or function-style cast [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]
npm ERR! C:\Users\runneradmin\AppData\Local\node-gyp\Cache\20.12.2\include\node\v8-template.h(809,8): message : see declaration of 'v8::ObjectTemplate::SetAccessor' [C:\npm\prefix\node_modules\os-service\build\service.vcxproj]