Unpin Node 20 version in CI (#240)

* Unpin Node 20 version in CI

* Update dev dependencies

Author: mattt

.github/workflows/ci.yml

@@ -13,8 +13,7 @@ jobs:
     strategy:
       matrix:
         # See supported Node.js release schedule at https://nodejs.org/en/about/previous-releases
-        # FIXME: Tests are failing on Node.js v20.12.1 (https://github.com/replicate/replicate-javascript/issues/237)
-        node-version: [18.x, 20.11.1]
+        node-version: [18.x, 20.x]
 
     steps:
       - uses: actions/checkout@v4