Bumps [underscore.string](https://github.com/epeli/underscore.string) from 3.3.4 to 3.3.5.
- [Release notes](https://github.com/epeli/underscore.string/releases)
- [Changelog](https://github.com/esamattis/underscore.string/blob/master/CHANGELOG.markdown)
- [Commits](https://github.com/epeli/underscore.string/compare/3.3.4...3.3.5)
Signed-off-by: Ndependabot[bot] <support@github.com>

Bumps [sshpk](https://github.com/joyent/node-sshpk) from 1.10.2 to 1.16.1.
- [Release notes](https://github.com/joyent/node-sshpk/releases)
- [Commits](https://github.com/joyent/node-sshpk/compare/v1.10.2...v1.16.1)
Signed-off-by: Ndependabot[bot] <support@github.com>

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.10 to 4.17.13.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.10...4.17.13)
Signed-off-by: Ndependabot[bot] <support@github.com>

Bumps [extend](https://github.com/justmoon/node-extend) from 3.0.1 to 3.0.2.
- [Release notes](https://github.com/justmoon/node-extend/releases)
- [Changelog](https://github.com/justmoon/node-extend/blob/master/CHANGELOG.md)
- [Commits](https://github.com/justmoon/node-extend/compare/v3.0.1...v3.0.2)
Signed-off-by: Ndependabot[bot] <support@github.com>

fix a bug referred in issue #946