Bump cross-spawn, @zowe/imperative and @zowe/cli

Bumps [cross-spawn](https://github.com/moxystudio/node-cross-spawn) to 7.0.6 and updates ancestor dependencies [cross-spawn](https://github.com/moxystudio/node-cross-spawn), [@zowe/imperative](https://github.com/zowe/zowe-cli) and [@zowe/cli](https://github.com/zowe/zowe-cli). These dependencies need to be updated together.


Updates `cross-spawn` from 7.0.3 to 7.0.6
- [Changelog](https://github.com/moxystudio/node-cross-spawn/blob/master/CHANGELOG.md)
- [Commits](moxystudio/node-cross-spawn@v7.0.3...v7.0.6)

Updates `cross-spawn` from 6.0.5 to 7.0.6
- [Changelog](https://github.com/moxystudio/node-cross-spawn/blob/master/CHANGELOG.md)
- [Commits](moxystudio/node-cross-spawn@v7.0.3...v7.0.6)

Updates `@zowe/imperative` from 5.27.2 to 8.8.2
- [Release notes](https://github.com/zowe/zowe-cli/releases)
- [Changelog](https://github.com/zowe/zowe-cli/blob/master/RELEASE_HISTORY.md)
- [Commits](https://github.com/zowe/zowe-cli/commits/v8.8.2)

Updates `@zowe/cli` from 7.29.4 to 8.8.2
- [Release notes](https://github.com/zowe/zowe-cli/releases)
- [Changelog](https://github.com/zowe/zowe-cli/blob/master/RELEASE_HISTORY.md)
- [Commits](zowe/zowe-cli@v7.29.4...v8.8.2)

---
updated-dependencies:
- dependency-name: cross-spawn
  dependency-type: indirect
- dependency-name: cross-spawn
  dependency-type: indirect
- dependency-name: "@zowe/imperative"
  dependency-type: direct:development
- dependency-name: "@zowe/cli"
  dependency-type: direct:development
...

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