Bump tree-kill from 1.2.1 to 1.2.2

Bumps [tree-kill](https://github.com/pkrumins/node-tree-kill) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/pkrumins/node-tree-kill/releases)
- [Commits](pkrumins/node-tree-kill@v1.2.1...v1.2.2)

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

Author: dependabot[bot]