Update to grasmash/expander ^3 (#57)

* Try grasmash/expander ^3

* Enable ocramius/package-verrsions for b/c test

* Revert "Enable ocramius/package-verrsions for b/c test"

This reverts commit 98eab69.

* Allow plugins in the other composer.json

* Create composer.json before modifying it

* Fix typo

* Fix another typo, try ^7

* Adjust PHP version for the b/c check

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
       - name: Install PHP with extensions
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 8.1
           coverage: none
           extensions: intl
 
@@ -63,7 +63,9 @@ jobs:
       - name: Install roave/backward-compatibility-check
         run: |
           mkdir -p tools
-          composer --working-dir=tools require roave/backward-compatibility-check:^5
+          echo '{}' > tools/composer.json
+          composer --working-dir=tools config --no-plugins allow-plugins.ocramius/package-versions true
+          composer --working-dir=tools require roave/backward-compatibility-check:^7
 
       - name: Run roave/backward-compatibility-check
         run: ./tools/vendor/bin/roave-backward-compatibility-check --from=2.0.1

composer.json

@@ -21,7 +21,7 @@
     "require": {
         "php": ">=7.1.3",
         "dflydev/dot-access-data": "^1.1.0 || ^2 || ^3",
-        "grasmash/expander": "^2.0.1",
+        "grasmash/expander": "^2.0.1 || ^3",
         "symfony/event-dispatcher": "^4 || ^5 || ^6"
     },
     "require-dev": {