Fix issues (#175)

* Drop deprecated `install` from Docker Buildx
* Fix typo in array type shape
* List modules available

Author: mk-mxp

.github/workflows/smoketest.yml

@@ -12,8 +12,6 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd
-        with:
-          install: true
 
       - name: Build Docker image and store in cache
         uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f

README.md

@@ -15,6 +15,8 @@ All final assets are built into the image, because the image does not have netwo
 
 Includes PHP extensions: ds, intl
 
+Default PHP modules available: Core, ctype, date, dom, fileinfo, filter, hash, iconv, json, libxml, mbstring, pcre, random, Reflection, SimpleXML, sodium, SPL, standard, tokenizer, xml, xmlreader, xmlwriter, zlib
+
 ### Test runner
 
 Test running a solution is coordinated by a bash script at `bin/run.sh` taking 3 positional arguments:

src/Tracer.php

@@ -48,7 +48,7 @@ final class Tracer implements TracerInterface
      *
      * @see https://exercism.org/docs/building/tooling/test-runners/interface#h-top-level
      *
-     * @var array{version: int, status: string, tests: list<Result>, messsage?: string}
+     * @var array{version: int, status: string, tests: list<Result>, message?: string}
      */
     private array $result = [
         'version' => 3,