Update dependency lerna to v3.10.8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
lerna	devDependencies	patch	3.10.7 -> 3.10.8	homepage, source

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Release Notes

lerna/lerna

### [`v3.10.8`](https://togithub.com/lerna/lerna/blob/master/CHANGELOG.md#​3108httpsgithubcomlernalernacomparev3107v3108-2019-02-01) [Compare Source](https://togithub.com/lerna/lerna/compare/v3.10.7...v3.10.8) ##### Bug Fixes - **conventional-commits:** Support legacy callback presets ([60647b4](https://togithub.com/lerna/lerna/commit/60647b4)), closes [#​1896](https://togithub.com/lerna/lerna/issues/1896) - **publish:** Skip private package lookup ([#​1905](https://togithub.com/lerna/lerna/issues/1905)) ([f9e18fa](https://togithub.com/lerna/lerna/commit/f9e18fa)) - **version:** Fix negated option links in readme ([0908212](https://togithub.com/lerna/lerna/commit/0908212))

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