Fix compat path in CHANGELOG (#702)

Author: mbleigh

CHANGELOG.md

@@ -12,7 +12,9 @@
 - Adds a special require that mimics Node.js 8 runtime logging in Node.js 10 and later runtimes:
 
   ```js
-  require('firebase-functions/logger/compat');
+  require('firebase-functions/lib/logger/compat');
   ```
 
   In newer runtimes, requiring this will emit text logs with multi-line support and appropriate severity. In the Node.js 8 runtime, the `compat` module has no effect.
+
+- Fixes `https.onRequest` type signature to allow Promises for `async` functions.