scheduleMicrotask utils removed in favor of dart:async

getQueryData wrong arrangment of arguments
Query & Retryer's future property is replaced with Completer
queryFn, fetchFn & fn types corrected
exported all the functions/class/enum  from core (incomplete)
flutter dependency dropped since the core is a Dart package

packages/fl_query/example/pubspec.lock

@@ -8,13 +8,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.8.2"
-  characters:
-    dependency: transitive
-    description:
-      name: characters
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
   charcode:
     dependency: transitive
     description:
@@ -43,11 +36,6 @@ packages:
       relative: true
     source: path
     version: "0.0.1"
-  flutter:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.0"
   hive:
     dependency: transitive
     description:
@@ -97,11 +85,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.1"
-  sky_engine:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.99"
   source_span:
     dependency: transitive
     description:
@@ -137,13 +120,5 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.5"
-  vector_math:
-    dependency: transitive
-    description:
-      name: vector_math
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.1"
 sdks:
   dart: ">=2.15.1 <3.0.0"
-  flutter: ">=1.17.0"