[9.x] Improves Support\Collection and Database\Eloquent\Collection type definitions (#38538)

* Adds CI workflow

* Adds phpstan

* Adds work in progress regarding generic collections

* Fixes missing template

* Renames template

* Updates test

* Apply fixes from StyleCI

* Adds work in progress regarding generic collections

* Adds work in progress regarding generic collections

* Adds work in progress regarding generic collections

* Adds work in progress regarding generic collections

* Adds work in progress regarding generic collections

* Styling

* Apply fixes from StyleCI

* Apply fixes from StyleCI

* Adds work in progress regarding generic collections

* Remove work on Models

* Revert "Remove work on Models"

This reverts commit d6c4291.

* Removes `prefer-lowest`

* Removes non needed code on CI job

Co-authored-by: Dries Vints <dries@vints.io>

* Fixes `Eloquent\Collection::load` types

* Adds work in progress regarding generic collections

* Fixes `Eloquent\Collection::load` related methods

Co-authored-by: Taylor Otwell <taylorotwell@users.noreply.github.com>
Co-authored-by: Dries Vints <dries@vints.io>

Author: 3 people

.github/workflows/types.yml

@@ -0,0 +1,43 @@
+name: types
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  linux_tests:
+    runs-on: ubuntu-20.04
+
+    strategy:
+      fail-fast: true
+      matrix:
+        php: ['8.0']
+        include:
+          - php: '8.1'
+            flags: "--ignore-platform-req=php"
+
+    name: PHP ${{ matrix.php }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+          coverage: none
+
+      - name: Install dependencies
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer update --prefer-stable --prefer-dist --no-interaction --no-progress ${{ matrix.flags }}
+
+      - name: Execute type checking
+        continue-on-error: ${{ matrix.php > 8 }}
+        run: vendor/bin/phpstan

composer.json

@@ -88,6 +88,7 @@
         "mockery/mockery": "^1.4.3",
         "orchestra/testbench-core": "^7.0",
         "pda/pheanstalk": "^4.0",
+        "phpstan/phpstan": "^0.12.94",
         "phpunit/phpunit": "^9.4",
         "predis/predis": "^1.1.2",
         "symfony/cache": "^6.0"

phpstan.neon.dist

@@ -0,0 +1,4 @@
+parameters:
+  paths:
+    - types
+  level: max