ci: run matrix test

.github/workflows/build.yml

@@ -17,6 +17,7 @@ jobs:
     strategy:
       matrix:
         node-version: [18.x, 20.x]
+        axios-version: ["1.4.0", "1.5.0", "1.6.0", "latest"]
 
     steps:
       - uses: actions/checkout@v3
@@ -25,6 +26,7 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm ci
+      - run: npm install axios@${{ matrix.axios-version }}
       - run: npm run build
       - run: npm run lint
       - run: npm run test

README.md

@@ -1,7 +1,9 @@
 # aws4-axios
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+
 [![All Contributors](https://img.shields.io/badge/all_contributors-6-orange.svg?style=flat-square)](#contributors-)
+
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 [![npm version](https://img.shields.io/npm/v/aws4-axios.svg?style=flat-square)](https://www.npmjs.org/package/aws4-axios)
@@ -17,6 +19,18 @@ This may be useful for accessing AWS services protected with IAM auth such as an
 | --------------------- | ------------------------------- |
 | `yarn add aws4-axios` | `npm install --save aws4-axios` |
 
+# Compatibility
+
+This interceptor is heavily dependent on Axios internals, so minor changes to them can cause the interceptor to fail.
+
+Please make sure you are using one of the following versions of Axios before submitting issues etc.
+
+| Axios Version       | Supported? |
+| ------------------- | ---------- |
+| `< 1.4.0`           | ❌ No      |
+| `>= 1.4.0 <= 1.6.7` | ✅ Yes     |
+| `> 1.6.7`           | Unknown    |
+
 # Usage
 
 To add an interceptor to the default Axios client: