Migrated angel_migration

packages/orm/angel_migration/lib/src/column.dart

@@ -2,23 +2,23 @@ import 'package:angel_orm/angel_orm.dart';
 
 class MigrationColumn extends Column {
   final List<MigrationColumnReference> _references = [];
-  bool _nullable;
-  IndexType _index;
+  late bool _nullable;
+  IndexType? _index;
   dynamic _defaultValue;
 
   @override
   bool get isNullable => _nullable;
 
   @override
-  IndexType get indexType => _index;
+  IndexType get indexType => _index!;
 
   get defaultValue => _defaultValue;
 
   List<MigrationColumnReference> get externalReferences =>
       new List<MigrationColumnReference>.unmodifiable(_references);
 
-  MigrationColumn(ColumnType type,
-      {bool isNullable: true, int length, IndexType indexType, defaultValue})
+  MigrationColumn(ColumnType? type,
+      {bool isNullable: true, int? length, IndexType? indexType, defaultValue})
       : super(type: type, length: length) {
     _nullable = isNullable;
     _index = indexType;
@@ -49,11 +49,11 @@ class MigrationColumn extends Column {
 
 class MigrationColumnReference {
   final String foreignTable, foreignKey;
-  String _behavior;
+  String? _behavior;
 
   MigrationColumnReference._(this.foreignTable, this.foreignKey);
 
-  String get behavior => _behavior;
+  String? get behavior => _behavior;
 
   StateError _locked() =>
       new StateError('Cannot override existing "$_behavior" behavior.');

packages/orm/angel_migration/lib/src/table.dart

@@ -29,7 +29,7 @@ abstract class Table {
 
   MigrationColumn text(String name) => declare(name, ColumnType.text);
 
-  MigrationColumn varChar(String name, {int length}) {
+  MigrationColumn varChar(String name, {int? length}) {
     if (length == null) return declare(name, ColumnType.varChar);
     return declareColumn(
         name, new Column(type: ColumnType.varChar, length: length));

packages/orm/angel_migration/pubspec.yaml

@@ -1,14 +1,13 @@
 name: angel_migration
-version: 3.0.0
+version: 4.0.0
 description: Database migration runtime for Angel's ORM. Use this package to define schemas.
-author: Tobe O <thosakwe@gmail.com>
 homepage: https://github.com/angel-dart/migration
 publish_to: none
 environment:
-  sdk: '>=2.10.0 <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 dependencies:
   angel_orm:
     git: 
       url: https://github.com/dukefirehawk/angel.git
-      ref: sdk-2.12.x
+      ref: sdk-2.12.x_nnbd
       path: packages/orm/angel_orm