refactor: initial work on new experimental v4 api

.github/workflows/ci.yml

@@ -12,16 +12,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: dart-lang/setup-dart@v1
-        with:
-          sdk: 2.17.0
 
       - uses: actions/checkout@v2
 
       - name: Get dependencies
         run: dart pub get
 
       - name: Check formatting
-        run: dart format --set-exit-if-changed --output none .
+        run: dart format -l 200 --set-exit-if-changed --output none .
 
       - name: Run lints
         run: dart analyze --fatal-warnings --fatal-infos

.gitignore

@@ -1,12 +1,7 @@
-# Flutter/Dart/Pub related
-**/doc/api/
+# https://dart.dev/guides/libraries/private-files
+# Created by `dart pub`
 .dart_tool/
-.packages
-.pub-cache/
-.pub/
-/build/
-pubspec.lock
 
-# dev
-Taskfile.yml
-.idea
+# Avoid committing pubspec.lock for library packages; see
+# https://dart.dev/guides/libraries/private-files#pubspeclock.
+pubspec.lock

.vscode/settings.json

@@ -0,0 +1,16 @@
+{
+    "dart.lineLength": 200,
+    "[dart]": {
+        "editor.formatOnSave": true,
+        "editor.formatOnType": true,
+        "editor.rulers": [
+            200
+        ],
+        "editor.codeActionsOnSave": {
+            "source.fixAll": "always",
+        }
+    },
+    "files.exclude": {
+        "**/.git": false,
+    }
+}