警告描述

Publishable packages can't have 'path' dependencies. Try adding a 'publish_to: none' entry to mark the package as not for publishing or remove the path dependency.dart(invalid_dependency)

解决方法

添加代码publish_to: none，如下：

name: example
description: A new Flutter project.
version: 1.0.0+1
# 下面这行代码防止包被意外发布到
# pub.dev使用pub publish。这是私有包的首选。
#如果你想发布到pub.dev，请删除publish_to: none
publish_to: none

environment:
  sdk: ">=2.13.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  flutter_bloc:
    path: ../

dependency_overrides:
  bloc:
    path: ../../bloc
  flutter_bloc:
    path: ../

flutter:
  uses-material-design: true