Add ext-gmp as an suggested dependency

Author: Riimu

composer.json

@@ -15,6 +15,9 @@
     "require": {
         "php": ">=5.4.0"
     },
+    "suggest": {
+        "ext-gmp" : "To convert GMP numbers into PHP code"
+    },
     "autoload": {
         "psr-4": {
             "Riimu\\Kit\\PHPEncoder\\": "src/"

src/PHPEncoder.php

@@ -94,10 +94,7 @@ public function addEncoder(Encoder\Encoder $encoder, $prepend = false)
     public function setOption($option, $value)
     {
         if (!$this->isValidOption($option)) {
-            throw new InvalidOptionException(sprintf(
-                "Invalid encoder option '%s'",
-                $option
-            ));
+            throw new InvalidOptionException(sprintf("Invalid encoder option '%s'", $option));
         }
 
         $this->options[$option] = $value;
@@ -153,10 +150,7 @@ public function getAllOptions(array $overrides = [])
 
         foreach ($overrides as $name => $value) {
             if (!array_key_exists($name, $options)) {
-                throw new InvalidOptionException(sprintf(
-                    "Invalid encoder option '%s'",
-                    $name
-                ));
+                throw new InvalidOptionException(sprintf("Invalid encoder option '%s'", $name));
             }
 
             $options[$name] = $value;