Use As<>() instead of Cast() where appropriate

src/binding.cpp

@@ -105,7 +105,7 @@ void ExtractOptions(v8::Local<v8::Object> options, void* cptr, sass_context_wrap
   v8::Local<v8::Value> importer_callback = Nan::Get(options, Nan::New("importer").ToLocalChecked()).ToLocalChecked();
 
   if (importer_callback->IsFunction()) {
-    v8::Local<v8::Function> importer = v8::Local<v8::Function>::Cast(importer_callback);
+    v8::Local<v8::Function> importer = importer_callback.As<v8::Function>();
     auto bridge = std::make_shared<CustomImporterBridge>(new Nan::Callback(importer), ctx_w->is_sync);
     ctx_w->importer_bridges.push_back(bridge);
 
@@ -115,7 +115,7 @@ void ExtractOptions(v8::Local<v8::Object> options, void* cptr, sass_context_wrap
     sass_option_set_c_importers(sass_options, c_importers);
   }
   else if (importer_callback->IsArray()) {
-    v8::Local<v8::Array> importers = v8::Local<v8::Array>::Cast(importer_callback);
+    v8::Local<v8::Array> importers = importer_callback.As<v8::Array>();
     Sass_Importer_List c_importers = sass_make_importer_list(importers->Length());
 
     for (size_t i = 0; i < importers->Length(); ++i) {
@@ -133,7 +133,7 @@ void ExtractOptions(v8::Local<v8::Object> options, void* cptr, sass_context_wrap
   v8::Local<v8::Value> custom_functions = Nan::Get(options, Nan::New("functions").ToLocalChecked()).ToLocalChecked();
 
   if (custom_functions->IsObject()) {
-    v8::Local<v8::Object> functions = v8::Local<v8::Object>::Cast(custom_functions);
+    v8::Local<v8::Object> functions = custom_functions.As<v8::Object>();
     v8::Local<v8::Array> signatures = Nan::GetOwnPropertyNames(functions).ToLocalChecked();
     unsigned num_signatures = signatures->Length();
     Sass_Function_List fn_list = sass_make_function_list(num_signatures);

src/custom_importer_bridge.cpp

@@ -7,7 +7,7 @@ SassImportList CustomImporterBridge::post_process_return_value(v8::Local<v8::Val
   Nan::HandleScope scope;
 
   if (returned_value->IsArray()) {
-    v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(returned_value);
+    v8::Local<v8::Array> array = returned_value.As<v8::Array>();
 
     imports = sass_make_import_list(array->Length());
 
@@ -20,7 +20,7 @@ SassImportList CustomImporterBridge::post_process_return_value(v8::Local<v8::Val
         continue;
       }
 
-      v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
+      v8::Local<v8::Object> object = value.As<v8::Object>();
 
       if (value->IsNativeError()) {
         char* message = create_string(Nan::Get(object, Nan::New<v8::String>("message").ToLocalChecked()));
@@ -36,7 +36,7 @@ SassImportList CustomImporterBridge::post_process_return_value(v8::Local<v8::Val
   }
   else if (returned_value->IsNativeError()) {
     imports = sass_make_import_list(1);
-    v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(returned_value);
+    v8::Local<v8::Object> object = returned_value.As<v8::Object>();
     char* message = create_string(Nan::Get(object, Nan::New<v8::String>("message").ToLocalChecked()));
 
     imports[0] = sass_make_import_entry(0, 0, 0);
@@ -45,7 +45,7 @@ SassImportList CustomImporterBridge::post_process_return_value(v8::Local<v8::Val
   }
   else if (returned_value->IsObject()) {
     imports = sass_make_import_list(1);
-    imports[0] = get_importer_entry(v8::Local<v8::Object>::Cast(returned_value));
+    imports[0] = get_importer_entry(returned_value.As<v8::Object>());
   }
 
   return imports;