fix bugs in onOpen callback to configure connection settings, improve…

…ments to README, implemented connection pool for 'postgres' (v2) driver_implementation

.pubignore

@@ -0,0 +1,32 @@
+# See https://www.dartlang.org/guides/libraries/private-files
+
+# Files and directories created by pub
+.dart_tool/
+.packages
+build/
+# If you're building an application, you may want to check-in your pubspec.lock
+pubspec.lock
+
+# Directory created by dartdoc
+# If you don't generate documentation locally you can remove this line.
+doc/api/
+
+# dotenv environment variables file
+.env*
+
+# Avoid committing generated Javascript files:
+*.dart.js
+*.info.json      # Produced by the --dump-info flag.
+*.js             # When generated by dart2js. Don't specify *.js if your
+                 # project includes source files written in JavaScript.
+*.js_
+*.js.deps
+*.js.map
+
+.flutter-plugins
+.flutter-plugins-dependencies
+
+main.exe
+teste_concorrencia.dart
+teste_utils.dart
+teste_insert_get_id.dart

lib/src/pdo/postgres/dependencies/executor/executor.dart

@@ -1,11 +1,9 @@
-
 library executor;
 
 import 'dart:async';
 import 'dart:collection';
 
-import 'package:stack_trace/stack_trace.dart';
-
+import 'package:eloquent/src/pdo/postgres/dependencies/stack_trace/stack_trace.dart';
 
 /// An async task that completes with a Future or a value.
 typedef AsyncTask<R> = FutureOr<R>? Function();
@@ -289,4 +287,4 @@ class _Item<R> {
   // Nullable R is used here so that we can return null during catchError
   final result = Completer<R?>();
   final done = Completer();
-}
+}