chore: bump minimum Dart SDK to 3.9.0

Raise the minimum Dart SDK of the pure-Dart packages (and the supabase
web example) from 3.4.0/3.3.0 to 3.9.0, matching supabase_flutter.

Bumping the language version switches `dart format` to its mandatory
"tall" style, so all affected packages are reformatted accordingly.

The higher language version also surfaces two things the old style hid:
- postgrest no longer implicitly promotes the bare `body as dynamic;`
  statement, so the casts in `_parseResponse` are made explicit
  (`body as Iterable` / `body as Map`).
- the formatter wraps a long single-line `if` in realtime_client onto
  two lines, so it now needs braces (curly_braces_in_flow_control_structures).

Author: spydon

packages/functions_client/lib/src/functions_client.dart

@@ -25,14 +25,15 @@ class FunctionsClient {
     http.Client? httpClient,
     YAJsonIsolate? isolate,
     String? region,
-  })  : _url = url,
-        _headers = {...Constants.defaultHeaders, ...headers},
-        _isolate = isolate ?? (YAJsonIsolate()..initialize()),
-        _hasCustomIsolate = isolate != null,
-        _httpClient = httpClient,
-        _region = region {
+  }) : _url = url,
+       _headers = {...Constants.defaultHeaders, ...headers},
+       _isolate = isolate ?? (YAJsonIsolate()..initialize()),
+       _hasCustomIsolate = isolate != null,
+       _httpClient = httpClient,
+       _region = region {
     _log.config(
-        "Initialize FunctionsClient v$version with url '$url' and region '$region'");
+      "Initialize FunctionsClient v$version with url '$url' and region '$region'",
+    );
     _log.finest("Initialize with headers: $headers");
   }
 
@@ -107,8 +108,10 @@ class FunctionsClient {
     };
 
     final uri = Uri.parse('$_url/$functionName').replace(
-        queryParameters:
-            effectiveQueryParams.isNotEmpty ? effectiveQueryParams : null);
+      queryParameters: effectiveQueryParams.isNotEmpty
+          ? effectiveQueryParams
+          : null,
+    );
 
     final finalHeaders = <String, String>{
       ..._headers,
@@ -159,12 +162,13 @@ class FunctionsClient {
     _log.finest('Request: ${request.method} ${request.url} ${request.headers}');
 
     final response = await (_httpClient?.send(request) ?? request.send());
-    final responseType = (response.headers['Content-Type'] ??
-            response.headers['content-type'] ??
-            'text/plain')
-        .split(';')[0]
-        .trim()
-        .toLowerCase();
+    final responseType =
+        (response.headers['Content-Type'] ??
+                response.headers['content-type'] ??
+                'text/plain')
+            .split(';')[0]
+            .trim()
+            .toLowerCase();
 
     final isSuccessStatus =
         200 <= response.statusCode && response.statusCode < 300;

packages/functions_client/lib/src/types.dart

@@ -31,8 +31,11 @@ class FunctionException implements Exception {
   final dynamic details;
   final String? reasonPhrase;
 
-  const FunctionException(
-      {required this.status, this.details, this.reasonPhrase});
+  const FunctionException({
+    required this.status,
+    this.details,
+    this.reasonPhrase,
+  });
 
   @override
   String toString() =>

packages/functions_client/pubspec.yaml

@@ -6,7 +6,7 @@ repository: 'https://github.com/supabase/supabase-flutter/tree/main/packages/fun
 documentation: 'https://supabase.com/docs/reference/dart/functions-invoke'
 
 environment:
-  sdk: '>=3.4.0 <4.0.0'
+  sdk: '>=3.9.0 <4.0.0'
 
 dependencies:
   http: ^1.2.2

packages/functions_client/test/custom_http_client.dart

@@ -39,11 +39,13 @@ class CustomHttpClient extends BaseClient {
       );
     } else if (request.url.path.endsWith('sse')) {
       return StreamedResponse(
-          Stream.fromIterable(['a', 'b', 'c'].map((e) => utf8.encode(e))), 200,
-          request: request,
-          headers: {
-            "Content-Type": "text/event-stream",
-          });
+        Stream.fromIterable(['a', 'b', 'c'].map((e) => utf8.encode(e))),
+        200,
+        request: request,
+        headers: {
+          "Content-Type": "text/event-stream",
+        },
+      );
     } else if (request.url.path.endsWith('binary')) {
       return StreamedResponse(
         Stream.value([1, 2, 3, 4, 5]),
@@ -105,13 +107,15 @@ class CustomHttpClient extends BaseClient {
 
     if (request is MultipartRequest) {
       stream = Stream.value(
-        utf8.encode(jsonEncode([
-          for (final file in request.files)
-            {
-              "name": file.field,
-              "content": await file.finalize().bytesToString()
-            }
-        ])),
+        utf8.encode(
+          jsonEncode([
+            for (final file in request.files)
+              {
+                "name": file.field,
+                "content": await file.finalize().bytesToString(),
+              },
+          ]),
+        ),
       );
       headers = {"Content-Type": "application/json"};
     } else {