Update lib/converter.js

lib/converter.js

@@ -8,11 +8,11 @@ function convertWebpToPng(input) {
         const response = await fetch(input);
         const images = await response.arrayBuffer();
         const converting = await sharp(images);
-        const converted = converting.toFormat('png').png({ quality: 90 }).toBuffer();
+        const converted = await converting.toFormat('png').png({ quality: 90 }).toBuffer();
         resolve(converted);
       } else if (typeof input === "object") {
         const converting = await sharp(input);
-        const converted = converting.toFormat('png').png({ quality: 90 }).toBuffer();
+        const converted = await converting.toFormat('png').png({ quality: 90 }).toBuffer();
         resolve(converted);
       }
     } catch (e) {