Also run GitHub Actions with Node.js v15.

Author: jaydenseric

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        node: ['10', '12', '14']
+        node: ['10', '12', '14', '15']
     steps:
       - uses: actions/checkout@v1
       - name: Setup Node.js v${{ matrix.node }}

changelog.md

@@ -6,6 +6,7 @@
 
 - Updated the [`react`](https://npm.im/react) and [`react-dom`](https://npm.im/react-dom) peer dependencies to `16.8 - 17`.
 - Updated dependencies.
+- Also run GitHub Actions with Node.js v15.
 
 ## 12.0.0