docs: update version, deps and docs for 8.0 beta (#849)

* chore: up version and deps

* chore: use pnpm CLI to get versions

* add note for echarts 6 upgrade guide

* remove docs script

let cdn to redirect for us

* Revert "remove docs script"

This reverts commit 3bc237db9100864f2813249ac1693735a658e646.

* update demo links

.github/ISSUE_TEMPLATE.md

@@ -1,36 +0,0 @@
-> ## Help / 帮助
->
-> Replace the `[ ]` with `[x]` to check an option. / 将 `[ ]` 替换为 `[x]` 以选择对应选项。
-
-## The type of this issue / Issue 类型
-
-- [ ] Feature request / 新特性需求
-- [ ] Bug report / Bug 报告
-
-## Not introduced by ECharts / 非 ECharts 本身问题
-
-Problems about ECharts itself are not handled in this repo. / 本 repo 不负责处理 ECharts 本身的问题。
-
-- [ ] I've checked it's not a problem of ECharts itself. / 我已检查过，这个问题非 ECharts 本身的问题。
-
-## Details / 详情
-
-### Vue version / Vue 版本
-
-- [ ] Vue 3
-- [ ] Vue 2
-
-### How are you importing Vue-ECharts? / 你是如何引入 Vue-ECharts 的？
-
-- [ ] Importing `vue-echarts` with a bundler environment / 在 webpack 等打包工具环境下引入 `vue-echarts`
-- [ ] Using the global variable by including `<script>` tags / 通过 `<script>` 标签引入全局变量
-
-### The version of Vue-ECharts you are using / Vue-ECharts 的版本
-
-> eg. 6.0.0-beta.5
-
-## Reproduction link / 复现链接
-
-**For bug reports, please provide the steps to reproduce and if possible a minimal demo of the problem. Please paste the link to your CodeSandbox demo below: ([Vue 3 template](https://codesandbox.io/s/charming-night-2y6m6?file=/src/App.vue) / [Vue 2 template](https://codesandbox.io/s/suspicious-glitter-mk66j?file=/src/App.vue))**
-
-**对于 Bug 报告，请在下面提供复现的步骤，最好是最小化的能够重现问题的 demo。请在下方贴入在 CodeSandbox 上 demo 的链接：（[Vue 3 模板](https://codesandbox.io/s/charming-night-2y6m6?file=/src/App.vue) / [Vue 2 模板](https://codesandbox.io/s/suspicious-glitter-mk66j?file=/src/App.vue)）**

.github/ISSUE_TEMPLATE/bug-report.en-US.yml

@@ -41,6 +41,6 @@ body:
     id: repro
     attributes:
       label: Reproduction
-      description: "A link to a boiled-down reproduction (a minimal but runnable demo with unnecessary dependencies pruned). If the issue isn't reproducible within an online playground, please create a GitHub repo to reflect the problem. Please paste the link to your CodeSandbox demo or GitHub repo below: ([Vue 3 template](https://codesandbox.io/s/charming-night-2y6m6?file=/src/App.vue) / [Vue 2 template](https://codesandbox.io/s/suspicious-glitter-mk66j?file=/src/App.vue))"
+      description: "A link to a boiled-down reproduction (a minimal but runnable demo with unnecessary dependencies pruned). If the issue isn't reproducible within an online playground, please create a GitHub repo to reflect the problem. Please paste the link to your [StackBlitz demo](https://stackblitz.com/edit/vue-echarts-8?file=src%2FApp.vue) or GitHub repo below:"
     validations:
       required: true

.github/ISSUE_TEMPLATE/bug-report.zh-Hans.yml

@@ -41,6 +41,6 @@ body:
     id: repro
     attributes:
       label: 问题复现
-      description: "请提供一个精炼的问题复现（去除无关依赖的最小化可运行 demo）。如果在线环境无法复现，可以创建对应的 GitHub repo 来提供复现环境。请在下方贴入在 CodeSandbox 上 demo 的链接或 GitHub repo 链接：（[Vue 3 模板](https://codesandbox.io/s/charming-night-2y6m6?file=/src/App.vue) / [Vue 2 模板](https://codesandbox.io/s/suspicious-glitter-mk66j?file=/src/App.vue)）"
+      description: "请提供一个精炼的问题复现（去除无关依赖的最小化可运行 demo）。如果在线环境无法复现，可以创建对应的 GitHub repo 来提供复现环境。请在下方贴入 [StackBlitz demo](https://stackblitz.com/edit/vue-echarts-8?file=src%2FApp.vue) 的链接或 GitHub repo 链接："
     validations:
       required: true