Initialize GitHub actions

.github/workflows/build.yaml

@@ -0,0 +1,116 @@
+name: "build"
+on:
+    push:
+        branches:
+            - "master"
+    pull_request: ~
+
+jobs:
+    coding-standards:
+        name: "Coding Standards"
+
+        runs-on: "ubuntu-latest"
+
+        strategy:
+            matrix:
+                php-version:
+                    - "5.6"
+                    - "7.3"
+                    - "7.4"
+                    - "8.0"
+
+                dependencies:
+                    - "highest"
+
+        steps:
+            -   name: "Checkout"
+                uses: "actions/checkout@v2"
+
+            -   name: "Setup PHP, with composer and extensions"
+                uses: "shivammathur/setup-php@v2"
+                with:
+                    php-version: "${{ matrix.php-version }}"
+                    extensions: "${{ env.PHP_EXTENSIONS }}"
+                    coverage: "none"
+
+            -   name: "Install composer dependencies"
+                uses: "ramsey/composer-install@v1"
+                with:
+                    dependency-versions: "${{ matrix.dependencies }}"
+
+            -   name: "Validate composer"
+                run: "composer validate --strict"
+
+    dependency-analysis:
+        name: "Dependency Analysis"
+
+        runs-on: "ubuntu-latest"
+
+        strategy:
+            matrix:
+                php-version:
+                    - "5.6"
+                    - "7.3"
+                    - "7.4"
+                    - "8.0"
+
+                dependencies:
+                    - "highest"
+
+        steps:
+            -   name: "Checkout"
+                uses: "actions/checkout@v2"
+
+            -   name: "Setup PHP, with composer and extensions"
+                uses: "shivammathur/setup-php@v2"
+                with:
+                    coverage: "none"
+                    php-version: "${{ matrix.php-version }}"
+                    tools: "composer-require-checker, composer-unused"
+
+            -   name: "Install composer dependencies"
+                uses: "ramsey/composer-install@v1"
+                with:
+                    dependency-versions: "${{ matrix.dependencies }}"
+
+            -   name: "Run maglnet/composer-require-checker"
+                run: "composer-require-checker check"
+
+            -   name: "Run composer-unused/composer-unused"
+                run: "composer-unused"
+
+    unit-tests:
+        name: "Unit tests"
+
+        runs-on: "ubuntu-latest"
+
+        strategy:
+            matrix:
+                php-version:
+                    - "5.6"
+                    - "7.3"
+                    - "7.4"
+                    - "8.0"
+
+                dependencies:
+                    - "lowest"
+                    - "highest"
+
+        steps:
+            -   name: "Checkout"
+                uses: "actions/checkout@v2"
+
+            -   name: "Setup PHP, with composer and extensions"
+                uses: "shivammathur/setup-php@v2"
+                with:
+                    php-version: "${{ matrix.php-version }}"
+                    extensions: "${{ env.PHP_EXTENSIONS }}"
+                    coverage: "none"
+
+            -   name: "Install composer dependencies"
+                uses: "ramsey/composer-install@v1"
+                with:
+                    dependency-versions: "${{ matrix.dependencies }}"
+
+            -   name: "Run phpunit"
+                run: "vendor/bin/phpunit"

.gitignore

@@ -4,3 +4,4 @@ php-klaviyo.iml
 vendor
 .phpunit.result.cache
 composer.phar
+composer.lock

composer.json

@@ -12,6 +12,7 @@
         }
     ],
     "require": {
+        "php": ">=5.6",
         "ext-json": "*",
         "ext-curl": "*"
     },