Fix error "Fundevogel\Exception not found"

Author: S1SYPHOS

composer.json

@@ -3,7 +3,7 @@
     "description": "Kirby v3 wrapper for colorist",
     "type": "kirby-plugin",
     "license": "MIT",
-    "version": "1.6.2",
+    "version": "1.7.0",
     "keywords": ["kirby3", "image", "graphics"],
     "homepage": "https://github.com/Fundevogel/kirby3-colorist#readme",
     "authors": [

src/Colorist.php

@@ -2,6 +2,8 @@
 
 namespace Fundevogel;
 
+use Exception;
+
 use Kirby\Image\Darkroom;