Update dependency grunt-contrib-uglify to v5.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
grunt-contrib-uglify	5.0.1 -> 5.1.0

---

Release Notes

gruntjs/grunt-contrib-uglify

### [`v5.1.0`](https://togithub.com/gruntjs/grunt-contrib-uglify/releases/v5.1.0) [Compare Source](https://togithub.com/gruntjs/grunt-contrib-uglify/compare/v5.0.1...v5.1.0) - Update deps, v5.1.0 ([#​564](https://togithub.com/gruntjs/grunt-contrib-uglify/issues/564)) [`e410511`](https://togithub.com/gruntjs/grunt-contrib-uglify/commit/e410511) - Update uglify-js to v3.15.2 ([#​562](https://togithub.com/gruntjs/grunt-contrib-uglify/issues/562)) [`2cb31be`](https://togithub.com/gruntjs/grunt-contrib-uglify/commit/2cb31be) - Fix wording in README.md ([#​560](https://togithub.com/gruntjs/grunt-contrib-uglify/issues/560)) [`12ca0f2`](https://togithub.com/gruntjs/grunt-contrib-uglify/commit/12ca0f2) - Bump path-parse from 1.0.6 to 1.0.7 ([#​558](https://togithub.com/gruntjs/grunt-contrib-uglify/issues/558)) [`1f6a012`](https://togithub.com/gruntjs/grunt-contrib-uglify/commit/1f6a012) - Update uglify-js ([#​557](https://togithub.com/gruntjs/grunt-contrib-uglify/issues/557)) [`0e4b1a0`](https://togithub.com/gruntjs/grunt-contrib-uglify/commit/0e4b1a0) - Bump hosted-git-info from 2.8.8 to 2.8.9 ([#​556](https://togithub.com/gruntjs/grunt-contrib-uglify/issues/556)) [`9ccf10d`](https://togithub.com/gruntjs/grunt-contrib-uglify/commit/9ccf10d)

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.