Update gulp to the latest version 🚀

[greenkeeper]

The devDependency gulp was updated from 3.9.1 to 4.0.2.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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Release Notes for v4.0.2

Fix

• Bind src/dest/symlink to the gulp instance to support esm exports (5667666) - Ref standard-things/esm#797

Docs

• Add notes about esm support (4091bd3) - Closes #2278
• Fix the Negative Globs section & examples (3c66d95) - Closes #2297
• Remove next tag from recipes (1693a11) - Closes #2277
• Add default task wrappers to Watching Files examples to make runnable (d916276) - Closes #2322
• Fix syntax error in lastRun API docs (ea52a92) - Closes #2315
• Fix typo in Explaining Globs (5d81f42) - Closes #2326

Build

• Add node 12 to Travis & Azure (b4b5a68)

Commits

The new version differs by 220 commits.

• 069350a Release: 4.0.2
• b4b5a68 Build: Add node 12 to Travis & Azure
• 5667666 Fix: Bind src/dest/symlink to the gulp instance to support esm exports (ref standard-things/esm#797)
• 4091bd3 Docs: Add notes about esm support (closes #2278)
• 3c66d95 Docs: Fix the Negative Globs section & examples (closes #2297)
• 1693a11 Docs: Remove next tag from recipes (closes #2277)
• d916276 Docs: Add default task wrappers to Watching Files examples to make runnable (ref #2322)
• ea52a92 Docs: Fix syntax error in lastRun API docs (closes #2315)
• 5d81f42 Docs: Fix typo in Explaining Globs (#2326)
• ea3bba4 Release: 4.0.1
• d3734d3 Upgrade: Update glob-watcher, gulp-cli, and undertaker dependencies & rimraf devDep
• 88437f2 Docs: Improve wording of file rename (#2314)
• 53b9037 Docs: Add note about transpilation to "Splitting a Gulpfile" section (closes #2311) (#2312)
• f3f0548 Docs: Add Azure Pipelines badge (#2310)
• 34a6d53 Build: Fix Azure comment (#2307)

There are 220 commits in total.

See the full diff

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