Laravel 8 support

* laravel 8 support
* drop support for php 7.2

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 7.2
   - 7.3
   - 7.4
 

composer.json

@@ -17,14 +17,14 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.3",
         "ext-json": "*",
-        "illuminate/config": "^6.0|^7.0",
-        "illuminate/database": "^6.0|^7.0",
-        "illuminate/support": "^6.0|^7.0"
+        "illuminate/config": "^6.0|^7.0|^8.0",
+        "illuminate/database": "^6.0|^7.0|^8.0",
+        "illuminate/support": "^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "orchestra/testbench": "^4.0|^5.0",
+        "orchestra/testbench": "^4.0|^5.0|^6.0",
         "phpunit/phpunit": "^8.0|^9.0"
     },
     "autoload": {

phpunit.xml

@@ -1,30 +1,21 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="vendor/autoload.php"
-         backupGlobals="false"
-         backupStaticAttributes="false"
-         colors="true"
-         verbose="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false">
-    <testsuites>
-        <testsuite name="Test Suite">
-            <directory>tests</directory>
-        </testsuite>
-    </testsuites>
-    <filter>
-        <whitelist>
-            <directory suffix=".php">src/</directory>
-        </whitelist>
-    </filter>
-    <logging>
-        <log type="testdox-text" target="testdox.txt"/>
-    </logging>
-    <php>
-        <env name="APP_ENV" value="testing"/>
-        <env name="DB_CONNECTION" value="sqlite"/>
-        <env name="DB_DATABASE" value=":memory:"/>
-    </php>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/autoload.php" backupGlobals="false" backupStaticAttributes="false" colors="true" verbose="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory suffix=".php">src/</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="Test Suite">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
+  <logging>
+    <testdoxText outputFile="testdox.txt"/>
+  </logging>
+  <php>
+    <env name="APP_ENV" value="testing"/>
+    <env name="DB_CONNECTION" value="sqlite"/>
+    <env name="DB_DATABASE" value=":memory:"/>
+  </php>
 </phpunit>

src/BuyableTrait.php

@@ -20,6 +20,7 @@ public function getBuyableIdentifier()
      * Get the description or title of the Buyable item.
      *
      * @return string
+     * @throws \Exception
      */
     public function getBuyableDescription()
     {
@@ -30,6 +31,7 @@ public function getBuyableDescription()
      * Get the price of the Buyable item.
      *
      * @return float|null
+     * @throws \Exception
      */
     public function getBuyablePrice()
     {