Fix PHP 5.3

.github/workflows/ci.yml

@@ -3,13 +3,41 @@ name: CI
 on: [push]
 
 jobs:
+  oldest:
+    name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      matrix:
+        operating-system: ['ubuntu-18.04']
+        php-versions: ['5.3']
+        phpunit-versions: ['5.7.27']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: mbstring, intl
+          ini-values: post_max_size=256M, max_execution_time=180
+          tools: psalm, phpunit:${{ matrix.phpunit-versions }}
+
+      - name: Install dependencies
+        run: composer self-update --1; composer install
+
+      - name: PHPUnit tests
+        uses: php-actions/phpunit@v2
+        with:
+          memory_limit: 256M
+
   old:
     name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
         operating-system: ['ubuntu-18.04']
-        php-versions: ['5.3', '5.4', '5.5', '5.6', '7.0']
+        php-versions: ['5.4', '5.5', '5.6', '7.0']
         phpunit-versions: ['6.5.14']
     steps:
       - name: Checkout
@@ -24,7 +52,7 @@ jobs:
           tools: psalm, phpunit:${{ matrix.phpunit-versions }}
 
       - name: Install dependencies
-        run: composer self-update --1; composer install
+        run: composer self-update --1; composer install; composer require vimeo/psalm
 
       - name: PHPUnit tests
         uses: php-actions/phpunit@v2
@@ -55,7 +83,7 @@ jobs:
         run: composer install
 
       - name: Modernize dependencies
-        run: composer require --dev "phpunit/phpunit:>=4"
+        run: composer require --dev "phpunit/phpunit:>=4"; composer require vimeo/psalm
 
       - name: PHPUnit tests
         uses: php-actions/phpunit@v2
@@ -87,7 +115,7 @@ jobs:
           tools: psalm, phpunit:${{ matrix.phpunit-versions }}
 
       - name: Install dependencies
-        run: composer install
+        run: composer install; composer require vimeo/psalm
       - name: PHPUnit tests
         uses: php-actions/phpunit@v2
         timeout-minutes: 30

composer.json

@@ -30,8 +30,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": ">= 4",
-    "paragonie/random_compat": "^1.4|^2",
-    "vimeo/psalm": "*"
+    "paragonie/random_compat": "^1.4|^2"
   },
   "autoload": {
     "psr-4": {