Merge pull request #218 from SimonFrings/1.x-hhvm

[1.x] Fix legacy HHVM build by downgrading Composer

Author: WyriHaximus

.github/workflows/ci.yml

@@ -41,5 +41,6 @@ jobs:
       - uses: azjezz/setup-hhvm@v1
         with:
           version: lts-3.30
+      - run: composer self-update --2.2 # downgrade Composer for HHVM
       - run: hhvm $(which composer) install
       - run: hhvm vendor/bin/phpunit

README.md

@@ -4,7 +4,7 @@ React/Promise
 A lightweight implementation of
 [CommonJS Promises/A](http://wiki.commonjs.org/wiki/Promises/A) for PHP.
 
-[![CI status](https://github.com/reactphp/promise/workflows/CI/badge.svg?branch=1.x)](https://github.com/reactphp/promise/actions)
+[![CI status](https://github.com/reactphp/promise/actions/workflows/ci.yml/badge.svg?branch=1.x)](https://github.com/reactphp/promise/actions)
 [![installs on Packagist](https://img.shields.io/packagist/dt/react/promise?color=blue&label=installs%20on%20Packagist)](https://packagist.org/packages/react/promise)
 
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