Update dependency chokidar to v2.1.7

Author: renovate-bot

package.json

@@ -23,7 +23,7 @@
     "backo2": "1.0.2",
     "blessed": "0.1.81",
     "bytes": "3.0.0",
-    "chokidar": "2.0.4",
+    "chokidar": "2.1.7",
     "clipboardy": "1.2.3",
     "color-hash": "1.0.3",
     "cross-fetch": "2.2.3",