Update dependency preact to v10.5.15

Author: renovate[bot]

package.json

@@ -56,7 +56,7 @@
   "dependencies": {
     "@storybook/client-api": "5.3.21",
     "@types/styled-jsx": "2.2.8",
-    "preact": "10.4.1",
+    "preact": "10.5.15",
     "preact-render-to-string": "5.1.7",
     "react-dom": "16.13.1",
     "styled-jsx": "3.2.5"