Bump uglifier from 2.2.1 to 2.7.2 in /util

[dependabot[bot]]

Bumps uglifier from 2.2.1 to 2.7.2.

Changelog

Sourced from uglifier's changelog.

2.7.2 (26 August 2015)

• update UglifyJS to 2.4.24

2.7.1 (27 February 2015)

• fix compatibility with experimental Alaska ExecJS runtime

2.7.0 (8 January 2015)

• copyright comment preservation also includes comments starting with a bang (!)

2.6.1 (1 January 2015)

• update UglifyJS to 2.4.16

2.6.0 (8 December 2014)

• allow metadata to be appended to minified code

2.5.3 (18 July 2014)

• no changes

2.5.2 (18 July 2014)

• update UglifyJS to 2.4.15

2.5.1 (13 June 2014)

• update UglifyJS to 2.4.14

2.5.0 (15 March 2014)

• update UglifyJS to 2.4.13
• process Angular @​ngInject annotations
• add keep_fargs option
• change ascii_only default to true

2.4.0 (19 December 2013)

• update UglifyJS to 2.4.8
• add drop_console compress option

2.3.3 (12 December 2013)

• update UglifyJS to 2.4.7

2.3.2 (1 December 2013)

... (truncated)

Commits

• f15cbb8 Bump version to 2.7.2
• 7d31d54 Disable rubocop
• 9436c6c Lock rubocop to 0.28
• 4677bfe Update UglifyJS to 2.4.24
• 887648d Update UglifyJS to 2.4.23
• f6e43e8 Update UglifyJS to 2.4.17
• 614f120 Update source-map to 0.1.36
• 63ce586 Bump version to 2.7.1
• 1aa4580 Fix alaska runtime setup
• de68b2c Explicitly include Alaska in build matrix
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/axr/website/network/alerts).