dependencies upgrade

lib/coingecko_dart.dart

@@ -58,8 +58,8 @@ class CoinGeckoApi {
       bool enableLogging = true}) {
     var options = BaseOptions(
         baseUrl: 'https://api.coingecko.com/api/v3',
-        connectTimeout: connectTimeout,
-        receiveTimeout: receiveTimeout,
+        connectTimeout: Duration(milliseconds: connectTimeout),
+        receiveTimeout: Duration(milliseconds: receiveTimeout),
         validateStatus: (code) => true,
         responseType: ResponseType.json);
     dio = Dio(options);
@@ -179,13 +179,12 @@ class CoinGeckoApi {
   }
 
   // ? /coins/{id}/ohlc
-  Future<CoinGeckoResult<dynamic>> ohlc(
-      {required String id,
-        required List<String> vs_currencies,
-        required int days,}) async {
-
-    Response response =
-    await dio!.get('/coins/$id/ohlc', queryParameters: {
+  Future<CoinGeckoResult<dynamic>> ohlc({
+    required String id,
+    required List<String> vs_currencies,
+    required int days,
+  }) async {
+    Response response = await dio!.get('/coins/$id/ohlc', queryParameters: {
       "vs_currency": vs_currencies.join(','),
       "days": days,
     });
@@ -278,7 +277,8 @@ class CoinGeckoApi {
       queryParams['category'] = category.asString;
     if (coinIds.isNotEmpty) queryParams['ids'] = coinIds.join(',');
     if (priceChangePercentage.isNotEmpty)
-      queryParams['price_change_percentage'] = priceChangePercentage.map((e)=>e.asString).join(',');
+      queryParams['price_change_percentage'] =
+          priceChangePercentage.map((e) => e.asString).join(',');
     Response response =
         await dio!.get('/coins/markets', queryParameters: queryParams);
 
@@ -708,7 +708,7 @@ enum ChartTimeInterval { MINUTELY, HOURLY, DAILY, EMPTY }
 
 enum MarketInterval { T_1H, T_24H, T_7D, T_14D, T_30D, T_200D, T_1Y }
 
-extension MarketIntervalExt on MarketInterval{
+extension MarketIntervalExt on MarketInterval {
   String get asString => this.toString().substring(2).toLowerCase();
 }
 

lib/dataClasses/coins/CoinDataPoint.dart

@@ -1,7 +1,6 @@
 
 
 import 'package:coingecko_dart/helperClass/staticHelpers.dart';
-import 'package:intl/intl.dart';
 
 class CoinDataPoint{
   DateTime? date;

lib/dataClasses/coins/PricedCoinBase.dart

@@ -1,4 +1,3 @@
-import 'Coin.dart';
 
 class PricedCoinBase {
   Map<String, double> data = Map();

lib/dataClasses/contracts/ContractToken.dart

@@ -1,6 +1,5 @@
 
 
-import 'package:coingecko_dart/dataClasses/coins/Coin.dart';
 
 class ContractToken {