chore(deps): update dependency gulp to v4.0.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
gulp	devDependencies	patch	4.0.1 -> 4.0.2	homepage, source

---

Release Notes

gulpjs/gulp

### [`v4.0.2`](https://togithub.com/gulpjs/gulp/releases/v4.0.2) [Compare Source](https://togithub.com/gulpjs/gulp/compare/v4.0.1...v4.0.2) ##### Fix - Bind src/dest/symlink to the gulp instance to support esm exports ([5667666](https://togithub.com/gulpjs/gulp/commit/5667666)) - Ref [standard-things/esm#​797](https://togithub.com/standard-things/esm/issues/797) ##### Docs - Add notes about esm support ([4091bd3](https://togithub.com/gulpjs/gulp/commit/4091bd3)) - Closes [#​2278](https://togithub.com/gulpjs/gulp/issues/2278) - Fix the Negative Globs section & examples ([3c66d95](https://togithub.com/gulpjs/gulp/commit/3c66d95)) - Closes [#​2297](https://togithub.com/gulpjs/gulp/issues/2297) - Remove next tag from recipes ([1693a11](https://togithub.com/gulpjs/gulp/commit/1693a11)) - Closes [#​2277](https://togithub.com/gulpjs/gulp/issues/2277) - Add default task wrappers to Watching Files examples to make runnable ([d916276](https://togithub.com/gulpjs/gulp/commit/d916276)) - Closes [#​2322](https://togithub.com/gulpjs/gulp/issues/2322) - Fix syntax error in lastRun API docs ([ea52a92](https://togithub.com/gulpjs/gulp/commit/ea52a92)) - Closes [#​2315](https://togithub.com/gulpjs/gulp/issues/2315) - Fix typo in Explaining Globs ([5d81f42](https://togithub.com/gulpjs/gulp/commit/5d81f42)) - Closes [#​2326](https://togithub.com/gulpjs/gulp/issues/2326) ##### Build - Add node 12 to Travis & Azure ([b4b5a68](https://togithub.com/gulpjs/gulp/commit/b4b5a68))

---

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.

[codecov[bot]]

Codecov Report

Merging #49 into develop will increase coverage by 0.24%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop      #49      +/-   ##
===========================================
+ Coverage    88.33%   88.57%   +0.24%     
===========================================
  Files           62       62              
  Lines          600      639      +39     
  Branches        32       67      +35     
===========================================
+ Hits           530      566      +36     
- Misses          64       67       +3     
  Partials         6        6

Impacted Files	Coverage Δ
src/propApi/join-group.ts	12.5% <0%> (-4.17%)	:arrow_down:
src/propApi/react-message.ts	100% <0%> (ø)	:arrow_up:
src/facebook.ts	100% <0%> (ø)	:arrow_up:
src/propApi/send-message.ts	100% <0%> (ø)	:arrow_up:
src/utils/browser.ts	100% <0%> (ø)	:arrow_up:
src/api.ts	99.42% <0%> (+0.01%)	:arrow_up:
src/utils/parse-form.ts	95.45% <0%> (+0.21%)	:arrow_up:
src/utils/formatter.ts	91.02% <0%> (+1.02%)	:arrow_up:
src/propApi/listen.ts	71.18% <0%> (+1.37%)	:arrow_up:
src/propApi/pull.ts	70% <0%> (+3.33%)	:arrow_up:
... and 1 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update cb80eda...44446ab. Read the comment docs.