Fix CI + Tidelift + lockfile [2.x.x]

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

.github/workflows/test.yml

@@ -0,0 +1,20 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        node-version: [lts/*, latest]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm test

README.md

@@ -1,4 +1,8 @@
-# [postcss][postcss]-filter-plugins [![Build Status](https://travis-ci.org/postcss/postcss-filter-plugins.svg?branch=master)][ci]
+# postcss-filter-plugins
+
+[![GitHub package.json version](https://img.shields.io/github/package-json/v/postcss/postcss-filter-plugins) ![npm downloads](https://img.shields.io/npm/dm/postcss-filter-plugins)](https://www.npmjs.com/package/postcss-filter-plugins)
+[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/postcss/postcss-filter-plugins/test.yml)](https://github.com/postcss/postcss-filter-plugins/actions)
+[![License](https://img.shields.io/github/license/postcss/postcss-filter-plugins)](https://github.com/postcss/postcss-filter-plugins)
 
 > Exclude/warn on duplicated PostCSS plugins.
 
@@ -125,7 +129,12 @@ Contributions of any kind welcome!
 
 MIT © [Ben Briggs](http://beneb.info)
 
-[ci]:      https://travis-ci.org/postcss/postcss-filter-plugins
+## Security contact information
+
+To report a security vulnerability, please use the
+[Tidelift security contact](https://tidelift.com/security).
+Tidelift will coordinate the fix and disclosure.
+
 [cssnano]: http://cssnano.co
 [cssnext]: http://cssnext.io
 [postcss]: https://github.com/postcss/postcss