Update preact

Author: myarcane

package.json

@@ -67,7 +67,7 @@
     "mocha": "^2.4.5",
     "npm-run-all": "^2.3.0",
     "phantomjs-prebuilt": "^2.1.5",
-    "preact": "^8.1.0",
+    "preact": "^8.2.7",
     "pretty-bytes-cli": "^1.0.0",
     "rollup": "^0.34.1",
     "rollup-plugin-babel": "^2.4.0",