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- 视频播放格式说明：去掉“H5平台：支持的视频格式视浏览器而定”多余“支持”文字

update: 更新案例

update: 更新 26 群加群信息

remove : 删除无用代码

Update README.md

Update README.md

build(deps): bump lodash from 4.17.11 to 4.17.15

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.11 to 4.17.15.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.11...4.17.15)
Signed-off-by: Ndependabot[bot] <support@github.com>

移除文档中的非 markdown 文件

build(deps-dev): bump webpack-bundle-analyzer from 3.1.0 to 3.3.2

Bumps [webpack-bundle-analyzer](https://github.com/webpack-contrib/webpack-bundle-analyzer) from 3.1.0 to 3.3.2.
- [Release notes](https://github.com/webpack-contrib/webpack-bundle-analyzer/releases)
- [Changelog](https://github.com/webpack-contrib/webpack-bundle-analyzer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/webpack-bundle-analyzer/compare/v3.1.0...v3.3.2)
Signed-off-by: Ndependabot[bot] <support@github.com>

build(deps): bump js-yaml from 3.12.2 to 3.13.1

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.12.2 to 3.13.1.
- [Release notes](https://github.com/nodeca/js-yaml/releases)
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodeca/js-yaml/compare/3.12.2...3.13.1)
Signed-off-by: Ndependabot[bot] <support@github.com>

build(deps): bump lodash.defaultsdeep from 4.6.0 to 4.6.1

Bumps [lodash.defaultsdeep](https://github.com/lodash/lodash) from 4.6.0 to 4.6.1.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.6.0...4.6.1)
Signed-off-by: Ndependabot[bot] <support@github.com>