docs: remove unavailable lgtm badge, add Backers image and link

.github/workflows/size-limit.yml

@@ -14,9 +14,7 @@ jobs:
       - name: Setup Node.js LTS
         uses: actions/setup-node@v4
         with:
-          # node-version: lts/*
-          # workaround for eslint-plugin-jsdoc@39 on main branch
-          node-version: 18
+          node-version: lts/*
           cache: yarn
 
       - name: Install Dependencies

README.md

@@ -1,7 +1,6 @@
 # dl-iconfont
 
 [![GitHub Actions](https://github.com/un-ts/dl-iconfont/workflows/CI/badge.svg)](https://github.com/un-ts/dl-iconfont/actions/workflows/ci.yml)
-[![Language grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/un-ts/dl-iconfont.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/un-ts/dl-iconfont/context:javascript)
 [![type-coverage](https://img.shields.io/badge/dynamic/json.svg?label=type-coverage&prefix=%E2%89%A5&suffix=%&query=$.typeCoverage.atLeast&uri=https%3A%2F%2Fraw.githubusercontent.com%2Fun-ts%2Fdl-iconfont%2Fmain%2Fpackage.json)](https://github.com/plantain-00/type-coverage)
 [![npm](https://img.shields.io/npm/v/dl-iconfont.svg)](https://www.npmjs.com/package/dl-iconfont)
 [![GitHub Release](https://img.shields.io/github/release/un-ts/dl-iconfont)](https://github.com/un-ts/dl-iconfont/releases)
@@ -88,6 +87,8 @@ await download(jsUrl, 'iconfont.js')
 
 ## Backers
 
+[![Backers](https://raw.githubusercontent.com/1stG/static/master/sponsors.svg)](https://github.com/sponsors/JounQin)
+
 | 1stG                                                                                                                             | RxTS                                                                                                                             | UnTS                                                                                                                             |
 | -------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- |
 | [![1stG Open Collective backers and sponsors](https://opencollective.com/1stG/individuals.svg)](https://opencollective.com/1stG) | [![RxTS Open Collective backers and sponsors](https://opencollective.com/rxts/individuals.svg)](https://opencollective.com/rxts) | [![UnTS Open Collective backers and sponsors](https://opencollective.com/unts/individuals.svg)](https://opencollective.com/unts) |