proto: add creation date filters in ListInvoiceRequest

lnrpc/lightning.proto

@@ -3633,7 +3633,16 @@ message ListInvoiceRequest {
     specified index offset. This can be used to paginate backwards.
     */
     bool reversed = 6;
+
+    // If set, returns all invoices with a creation date greater than or euqal
+    // to it. Measured in seconds since the unix epoch.
+    uint64 creation_date_start = 7;
+
+    // If set, returns all invoices with a creation date less than or euqal to
+    // it. Measured in seconds since the unix epoch.
+    uint64 creation_date_end = 8;
 }
+
 message ListInvoiceResponse {
     /*
     A list of invoices from the time slice of the time series specified in the