changelog: 0.13.4

Author: Will

changelog.md

@@ -5,6 +5,7 @@
 - readme: Grammar fixes.
 - watcher-nodejs: Moved `node-gyp` to `devDependencies` from `dependencies`, where it should be.
 - watcher-nodejs: Maintenance on the Node.js tests, which now ignore the very much non-idempotent `event.effectTime` field when comparing events.
+- watcher-nodejs: Updated a transitive development dependency (`cross-spawn`) to a non-vulnerable version.
 
 ## 0.13.3