upgrade to laravel 7 and set branch to v2

vendor/brick/math/src/Exception/IntegerOverflowException.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Exception;
+
+use Brick\Math\BigInteger;
+
+/**
+ * Exception thrown when an integer overflow occurs.
+ */
+class IntegerOverflowException extends MathException
+{
+    /**
+     * @param BigInteger $value
+     *
+     * @return IntegerOverflowException
+     *
+     * @psalm-pure
+     */
+    public static function toIntOverflow(BigInteger $value) : IntegerOverflowException
+    {
+        $message = '%s is out of range %d to %d and cannot be represented as an integer.';
+
+        return new self(\sprintf($message, (string) $value, PHP_INT_MIN, PHP_INT_MAX));
+    }
+}