ci: update commitlint monorepo

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@commitlint/cli	devDependencies	minor	7.5.2 -> 7.6.1
@commitlint/config-conventional	devDependencies	minor	7.5.0 -> 7.6.0
@commitlint/prompt-cli	devDependencies	minor	7.5.0 -> 7.6.1
@commitlint/travis-cli	devDependencies	minor	7.5.2 -> 7.6.1

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Release Notes

conventional-changelog/commitlint

### [`v7.6.1`](https://togithub.com/conventional-changelog/commitlint/blob/master/CHANGELOG.md#​761httpsgithubcomconventional-changelogcommitlintcomparev760v761-2019-05-09) [Compare Source](https://togithub.com/conventional-changelog/commitlint/compare/v7.6.0...v7.6.1) ##### Bug Fixes - ensure format() is available as commonjs default export [#​645](https://togithub.com/conventional-changelog/commitlint/issues/645) ([ec3da92](https://togithub.com/conventional-changelog/commitlint/commit/ec3da92)) - handle absolute config paths correctly [#​647](https://togithub.com/conventional-changelog/commitlint/issues/647) ([49b3a77](https://togithub.com/conventional-changelog/commitlint/commit/49b3a77)) ### [`v7.6.0`](https://togithub.com/conventional-changelog/commitlint/blob/master/CHANGELOG.md#​760httpsgithubcomconventional-changelogcommitlintcomparev752v760-2019-05-06) [Compare Source](https://togithub.com/conventional-changelog/commitlint/compare/v7.5.2...v7.6.0) ##### Bug Fixes - add [@​lerna/project](https://togithub.com/lerna/project) to repository dependencies ([#​598](https://togithub.com/conventional-changelog/commitlint/issues/598)) ([56f03ee](https://togithub.com/conventional-changelog/commitlint/commit/56f03ee)) - address security warnings for dev dependencies ([3e0d824](https://togithub.com/conventional-changelog/commitlint/commit/3e0d824)) - avoid excessive help text [#​606](https://togithub.com/conventional-changelog/commitlint/issues/606) ([#​637](https://togithub.com/conventional-changelog/commitlint/issues/637)) ([8f3c3b1](https://togithub.com/conventional-changelog/commitlint/commit/8f3c3b1)) - don't merge array properties with custom opts ([#​616](https://togithub.com/conventional-changelog/commitlint/issues/616)) ([f321647](https://togithub.com/conventional-changelog/commitlint/commit/f321647)), closes [#​594](https://togithub.com/conventional-changelog/commitlint/issues/594) - remove unneeded dev dependency ([6ccaf79](https://togithub.com/conventional-changelog/commitlint/commit/6ccaf79)) - update cosmiconfig to safe >=5 [#​599](https://togithub.com/conventional-changelog/commitlint/issues/599) ([f186fcb](https://togithub.com/conventional-changelog/commitlint/commit/f186fcb)) - use sander.readFile correctly ([#​448](https://togithub.com/conventional-changelog/commitlint/issues/448)) ([#​630](https://togithub.com/conventional-changelog/commitlint/issues/630)) ([8e47985](https://togithub.com/conventional-changelog/commitlint/commit/8e47985)) ##### Features - **resolve-extends:** accept short scoped package names in extends ([#​597](https://togithub.com/conventional-changelog/commitlint/issues/597)) ([ba90e8e](https://togithub.com/conventional-changelog/commitlint/commit/ba90e8e)) - adds support for plugins ([#​228](https://togithub.com/conventional-changelog/commitlint/issues/228)) ([#​588](https://togithub.com/conventional-changelog/commitlint/issues/588)) ([cea4564](https://togithub.com/conventional-changelog/commitlint/commit/cea4564)) - config based is-ignored overrides ([#​595](https://togithub.com/conventional-changelog/commitlint/issues/595)) ([2434d71](https://togithub.com/conventional-changelog/commitlint/commit/2434d71)) #### [7.5.2](https://togithub.com/conventional-changelog/commitlint/compare/v7.5.1...v7.5.2) (2019-02-11) ##### Bug Fixes - failing sentence-case for subjects with slashes ([#​574](https://togithub.com/conventional-changelog/commitlint/issues/574)) ([48a8602](https://togithub.com/conventional-changelog/commitlint/commit/48a8602)) - **cli:** replace old links with new organisation links ([#​578](https://togithub.com/conventional-changelog/commitlint/issues/578)) ([4075903](https://togithub.com/conventional-changelog/commitlint/commit/4075903)) #### [7.5.1](https://togithub.com/conventional-changelog/commitlint/compare/v7.5.0...v7.5.1) (2019-02-09) ##### Bug Fixes - **is-ignored:** ignore bitbuckets automatic merge ([#​573](https://togithub.com/conventional-changelog/commitlint/issues/573)) ([e5bdc5c](https://togithub.com/conventional-changelog/commitlint/commit/e5bdc5c))

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