Update dependency gulp-eslint to v0.15.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
gulp-eslint	devDependencies	minor	0.9.0 -> 0.15.0

---

Release Notes

adametry/gulp-eslint

v0.15.0

Compare Source

• Update dependencies
• Bump eslint dependency to ^0.24.0

v0.14.0

Compare Source

• Bump eslint dependency to ^0.23.0
• Remove no-longer-needed code
• Fix project eslintrc syntax

v0.13.2

Compare Source

• Remove dependency on through2 to address highWatermark overflow issue (#​36)

v0.13.1

Compare Source

• Update dependencies

v0.13.0

Compare Source

• Bump eslint dependency to ^0.22.1

v0.12.0

Compare Source

• Bump eslint dependency to 0.21.x

v0.11.1

Compare Source

• tidying-up dependencies

v0.11.0

Compare Source

• Improve code coverage
• Remove support for deprecated/legacy formatters

v0.10.0

Compare Source

• Bump eslint dependency to 0.20.x

---

Renovate configuration

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

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

:recycle: Rebasing: Whenever PR becomes conflicted, or if you modify the PR title to begin with "rebase!".

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

---

• [ ] If you want to rebase/retry this PR, check this box

---

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