refactor: replace Unwrap with Unwrapto

Author: miguelmarcondesf

napi-inl.h

@@ -2816,9 +2816,11 @@ inline Promise::Promise(napi_env env, napi_value value) : Object(env, value) {}
 inline MaybeOrValue<Promise> Promise::Then(napi_value onFulfilled) const {
   EscapableHandleScope scope(_env);
 #ifdef NODE_ADDON_API_ENABLE_MAYBE
-  MaybeOrValue<Value> thenMethodMaybe = Get("then");
-  Function thenMethod = thenMethodMaybe.Unwrap().As<Function>();
-  MaybeOrValue<Value> result = thenMethod.Call(*this, {onFulfilled});
+  Value thenMethod;
+  if (!Get("then").UnwrapTo(&thenMethod)) {
+    return Nothing<Promise>();
+  }
+  MaybeOrValue<Value> result = thenMethod.As<Function>().Call(*this, {onFulfilled});
   if (result.IsJust()) {
     return Just(scope.Escape(result.Unwrap()).As<Promise>());
   }
@@ -2836,9 +2838,11 @@ inline MaybeOrValue<Promise> Promise::Then(napi_value onFulfilled) const {
 inline MaybeOrValue<Promise> Promise::Then(napi_value onFulfilled, napi_value onRejected) const {
   EscapableHandleScope scope(_env);
 #ifdef NODE_ADDON_API_ENABLE_MAYBE
-  MaybeOrValue<Value> thenMethodMaybe = Get("then");
-  Function thenMethod = thenMethodMaybe.Unwrap().As<Function>();
-  MaybeOrValue<Value> result = thenMethod.Call(*this, {onFulfilled, onRejected});
+  Value thenMethod;
+  if (!Get("then").UnwrapTo(&thenMethod)) {
+    return Nothing<Promise>();
+  }
+  MaybeOrValue<Value> result = thenMethod.As<Function>().Call(*this, {onFulfilled, onRejected});
   if (result.IsJust()) {
     return Just(scope.Escape(result.Unwrap()).As<Promise>());
   }
@@ -2856,9 +2860,11 @@ inline MaybeOrValue<Promise> Promise::Then(napi_value onFulfilled, napi_value on
 inline MaybeOrValue<Promise> Promise::Catch(napi_value onRejected) const {
   EscapableHandleScope scope(_env);
 #ifdef NODE_ADDON_API_ENABLE_MAYBE
-  MaybeOrValue<Value> catchMethodMaybe = Get("catch");
-  Function catchMethod = catchMethodMaybe.Unwrap().As<Function>();
-  MaybeOrValue<Value> result = catchMethod.Call(*this, {onRejected});
+  Value catchMethod;
+  if (!Get("catch").UnwrapTo(&catchMethod)) {
+    return Nothing<Promise>();
+  }
+  MaybeOrValue<Value> result = catchMethod.As<Function>().Call(*this, {onRejected});
   if (result.IsJust()) {
     return Just(scope.Escape(result.Unwrap()).As<Promise>());
   }