fix: expand sharp peerDependency version

fixes #253

Author: KaelWD

package.json

@@ -26,7 +26,7 @@
   "peerDependencies": {
     "gm": "^1.23.0",
     "pug": "^2.0.0 || ^3.0.0",
-    "sharp": "^0.21.0",
+    "sharp": "*",
     "vue": "^2.7.2",
     "vuetify": "^1.3.0 || ^2.0.0",
     "webpack": "^4.0.0 || ^5.0.0"