PR #19108 caused some Suspense-related DevTools regressions (more info available on #19368) which we did not catch because of the fact that DevTools tests are only run against the version of React in master.

We should follow the precedent of the regression fixtures tests and have CI run DevTools tests against multiple

背景和动机

我们不希望将一些敏感的内容提交到 git 仓库中，所以这些敏感内容我们会和提交到 git 仓库的配置文件分离。

我们将这些机密内容放在 dotenv运行时加载到环境变量 或是 直接存于环境变量 中。

除此之外，配置可能因为程序运行环境发生改变，而需要动态的进行配置。

所以我们希望 kratos 能够在配置文件中动态的识别环境变量占位符，并使用环境变量值替换配置的内容。

提议的方案

提案在配置文件中，通过占位符来替换环境变量中的功能:

提案建议的占位符风格有如下几种：

• %(VARIABLE_NAME) ：传统的环境变量占位符
• %env(VARIABLE_NAME)% ： 带有环境变量处理器的占位符

传统的环境变量占位符

传统的占位符替换机制只能够替换环境变量（包含 dot

You may use this guide to make quality contributions at Hacktoberfest 2020: Hacktoberfest 2020 guide

To begin contributing, you shall get a quick overview of how Cosmos is used today. Cosmos is one of the most extensive code database and is used as:

• A datastore for various projects (such as [Quark](https://github.com/OpenGenus/

Is your feature request related to a problem? Please describe.
Navigator 2.0 and Router have been released and are now the recommended approach:

Currently, there is no recipe for this, there are only recipes for a Navigator-less approach and for the old 1.0 imperative approach:

https://bloclibrary.dev/#/recipesflutternavigation

Describe the solution you'd like
Document a recipe

Svg supported ie10+ and it should be default choice.