Upgrade: Bump pidtree from 0.5.0 to 0.6.0

Bumps [pidtree](https://github.com/simonepri/pidtree) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/simonepri/pidtree/releases)
- [Commits](simonepri/pidtree@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: pidtree
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -33,7 +33,7 @@
     "cross-spawn": "^7.0.3",
     "memorystream": "^0.3.1",
     "minimatch": "^5.0.0",
-    "pidtree": "^0.5.0",
+    "pidtree": "^0.6.0",
     "read-pkg": "^5.2.0",
     "shell-quote": "^1.6.1"
   },