Update sharp and yaml package

Author: ptrumpis

package.json

@@ -45,8 +45,8 @@
     "jszip": "~3.10.1",
     "mysql2": "~3.14.1",
     "node-cache": "5.1.2",
-    "sharp": "~0.34.1",
+    "sharp": "~0.34.2",
     "wayback.js": "~0.2.0",
-    "yaml": "~2.7.1"
+    "yaml": "~2.8.0"
   }
 }