package:aqueduct has versions on pub.dev 3.2.1, 3.3.0, and 3.3.0-b1. The constraint ^3.0.0 selects 3.3.0-b1. I would expect it to select 3.3.0.

It also selected 3.3.0-b1 when only 3.2.1 and 3.3.0-b1 existed (and 3.3.0 did not). If both 3.3.0-b1 and 3.3.0 can simply be deleted from pub.dev, that is best, however, I'd also like to understand what creates that behavior.

pub 2.7.0 macOS.

name: foobar
description: An empty Aqueduct application.
version: 0.0.1

environment:
  sdk: ">=2.0.0 <3.0.0"

dependencies:
  aqueduct: ^3.0.0

dev_dependencies:
  test: ^1.0.0
  aqueduct_test: ^1.0.0