tools: update clang-format from 1.2.3 to 1.6.0

PR-URL: nodejs/node#42685
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Trott

tools/clang-format/package-lock.json

@@ -4,6 +4,6 @@
   "description": "Formatting C++ files for Node.js core",
   "license": "MIT",
   "dependencies": {
-    "clang-format": "1.2.3"
+    "clang-format": "^1.6.0"
   }
 }