Add gasPrice to Polygon feeData for type 0 and type 1 legacy transact…

…ions (ethers-io#4315).

src.ts/providers/network.ts

@@ -329,9 +329,13 @@ function getGasStationPlugin(url: string) {
 
         let response;
         try {
-            response = await request.send();
+            const [ _response, _feeData ] = await Promise.all([
+                request.send(), fetchFeeData()
+            ]);
+            response = _response;
             const payload = response.bodyJson.standard;
             const feeData = {
+                gasPrice: _feeData.gasPrice,
                 maxFeePerGas: parseUnits(payload.maxFee, 9),
                 maxPriorityFeePerGas: parseUnits(payload.maxPriorityFee, 9),
             };