Migrate to Null-Safety (#91)

* refactor(nnbd): migrate to null-safety

* refactor(deps): remove merge_map package

* refactor(deps): remove color package

* chore(format): fix format

* feat(cli): support option of --no-sound-null-safety

* refactor(integration): add name of params

* refactor(nndb): add option for pubspec.yaml

* refactor(cli): remove unused var

* refactor(*): copy from dart_style

* refactor(*): refactor

* refactor(plugin): remove color libs

* refactor(plugin): remove color libs

* chore(deps): update deps

* chore(deps): update deps

* chore(analyze): fix analyze points

* chore(deps): add collection

* docs(changelog): update

* chore(*): update deps

* chore(*): bump up 3.0.1

* chore(*): bump up 3.0.1

* chore(deps): update deps

* chore(deps): update deps in sample

Author: wasabeef

CHANGELOG.md

@@ -1,3 +1,13 @@
+## 3.0.0, 3.0.1
+
+- Support Null Safety
+```yaml
+flutter_gen:
+  output: lib/gen/
+  line_length: 80
+  null_safety: true # Optional (default: true)
+```
+
 ## 2.0.1, 2.0.2, 2.0.3
 
 - Update dependencies

codecov.yaml

@@ -22,4 +22,6 @@ coverage:
 
 ignore:
   - "example/"
+  - "**/*.g.dart"
   - "**/*.gen.dart"
+  - "package/core/lib/utils/dart_style"

example/.dart_tool/build/entrypoint/build.dart

@@ -6,7 +6,7 @@
 // ignore_for_file: directives_ordering
 
 import 'package:build_runner_core/build_runner_core.dart' as _i1;
-import 'package:flutter_gen_runner/build.dart' as _i2;
+import 'package:flutter_gen_runner/flutter_gen_runner.dart' as _i2;
 import 'dart:isolate' as _i3;
 import 'package:build_runner/build_runner.dart' as _i4;
 import 'dart:io' as _i5;

example/lib/gen/assets.gen.dart

@@ -1,4 +1,3 @@
-// @dart = 2.10
 /// GENERATED CODE - DO NOT MODIFY BY HAND
 /// *****************************************************
 ///  FlutterGen
@@ -98,20 +97,20 @@ class AssetGenImage extends AssetImage {
   final String _assetName;
 
   Image image({
-    Key key,
-    ImageFrameBuilder frameBuilder,
-    ImageLoadingBuilder loadingBuilder,
-    ImageErrorWidgetBuilder errorBuilder,
-    String semanticLabel,
+    Key? key,
+    ImageFrameBuilder? frameBuilder,
+    ImageLoadingBuilder? loadingBuilder,
+    ImageErrorWidgetBuilder? errorBuilder,
+    String? semanticLabel,
     bool excludeFromSemantics = false,
-    double width,
-    double height,
-    Color color,
-    BlendMode colorBlendMode,
-    BoxFit fit,
+    double? width,
+    double? height,
+    Color? color,
+    BlendMode? colorBlendMode,
+    BoxFit? fit,
     AlignmentGeometry alignment = Alignment.center,
     ImageRepeat repeat = ImageRepeat.noRepeat,
-    Rect centerSlice,
+    Rect? centerSlice,
     bool matchTextDirection = false,
     bool gaplessPlayback = false,
     bool isAntiAlias = false,
@@ -149,19 +148,19 @@ class SvgGenImage {
   final String _assetName;
 
   SvgPicture svg({
-    Key key,
+    Key? key,
     bool matchTextDirection = false,
-    AssetBundle bundle,
-    String package,
-    double width,
-    double height,
+    AssetBundle? bundle,
+    String? package,
+    double? width,
+    double? height,
     BoxFit fit = BoxFit.contain,
     AlignmentGeometry alignment = Alignment.center,
     bool allowDrawingOutsideViewBox = false,
-    WidgetBuilder placeholderBuilder,
-    Color color,
+    WidgetBuilder? placeholderBuilder,
+    Color? color,
     BlendMode colorBlendMode = BlendMode.srcIn,
-    String semanticsLabel,
+    String? semanticsLabel,
     bool excludeFromSemantics = false,
     Clip clipBehavior = Clip.hardEdge,
   }) {
@@ -194,18 +193,18 @@ class FlareGenImage {
   final String _assetName;
 
   FlareActor flare({
-    String boundsNode,
-    String animation,
+    String? boundsNode,
+    String? animation,
     BoxFit fit = BoxFit.contain,
     Alignment alignment = Alignment.center,
     bool isPaused = false,
     bool snapToEnd = false,
-    FlareController controller,
-    FlareCompletedCallback callback,
-    Color color,
+    FlareController? controller,
+    FlareCompletedCallback? callback,
+    Color? color,
     bool shouldClip = true,
     bool sizeFromArtboard = false,
-    String artboard,
+    String? artboard,
     bool antialias = true,
   }) {
     return FlareActor(

example/lib/gen/colors.gen.dart

@@ -1,4 +1,3 @@
-// @dart = 2.10
 /// GENERATED CODE - DO NOT MODIFY BY HAND
 /// *****************************************************
 ///  FlutterGen

example/lib/gen/fonts.gen.dart

@@ -1,4 +1,3 @@
-// @dart = 2.10
 /// GENERATED CODE - DO NOT MODIFY BY HAND
 /// *****************************************************
 ///  FlutterGen