style: Migrate to very_good_analysis

packages/moxdns_linux/lib/moxdns_linux.dart

@@ -1,40 +1,44 @@
-import "package:moxdns/moxdns.dart";
-import "package:moxdns_platform_interface/moxdns_platform_interface.dart";
-import "package:flutter/services.dart";
+// ignore_for_file: avoid_print
+import 'package:flutter/services.dart';
+import 'package:moxdns/moxdns.dart';
+import 'package:moxdns_platform_interface/moxdns_platform_interface.dart';
 
 class MoxdnsLinuxPlugin extends MoxdnsPlatform {
+
+  MoxdnsLinuxPlugin() : _channel = const MethodChannel('me.polynom.moxdns_linux'), super();
   final MethodChannel _channel;
 
-  MoxdnsLinuxPlugin() : _channel = MethodChannel("me.polynom.moxdns_linux"), super();
-
   static void registerWith() {
-    print("MoxdnsLinuxPlugin: Registering implementation");
+    print('MoxdnsLinuxPlugin: Registering implementation');
     MoxdnsPlugin.platform = MoxdnsLinuxPlugin();
   }
   
   @override
   Future<List<SrvRecord>> srvQuery(String domain, bool dnssec) async {
     try {
-      final List<dynamic> results = await _channel.invokeMethod("srvQuery", {
-          "domain": domain,
-          "dnssec": dnssec
-      });
+      // TODO(PapaTutuWawa): Handle the result being null
+      final results = (await _channel.invokeMethod<List<dynamic>>('srvQuery', {
+          'domain': domain,
+          'dnssec': dnssec
+      }))!;
       final records = List<SrvRecord>.empty(growable: true);
-      for (var record in results) {
+      for (final record in results) {
         if (record == null) {
           continue;
         }
-        final rr = Map<String, dynamic>.from(record);
-        records.add(SrvRecord(
-            rr["target"]!,
-            rr["port"]! as int,
-            rr["priority"]! as int,
-            rr["weight"]! as int
-        ));
+        final rr = Map<String, String>.from(record as Map<String, String>);
+        records.add(
+          SrvRecord(
+            rr['target']!,
+            rr['port']! as int,
+            rr['priority']! as int,
+            rr['weight']! as int,
+          ),
+        );
       }
       return records;
     } on PlatformException catch(e) {
-      print("moxdns_linux: $e");
+      print('moxdns_linux: $e');
       return const [];
     }
   }

packages/moxdns_linux/lib/moxdns_linux_method_channel.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
-
-import 'moxdns_linux_platform_interface.dart';
+import 'package:moxdns_linux/moxdns_linux_platform_interface.dart';
 
 /// An implementation of [MoxdnsLinuxPlatform] that uses method channels.
 class MethodChannelMoxdnsLinux extends MoxdnsLinuxPlatform {

packages/moxdns_linux/lib/moxdns_linux_platform_interface.dart

@@ -1,7 +1,6 @@
+import 'package:moxdns_linux/moxdns_linux_method_channel.dart';
 import 'package:plugin_platform_interface/plugin_platform_interface.dart';
 
-import 'moxdns_linux_method_channel.dart';
-
 abstract class MoxdnsLinuxPlatform extends PlatformInterface {
   /// Constructs a MoxdnsLinuxPlatform.
   MoxdnsLinuxPlatform() : super(token: _token);