v4.0.0-alpha.1

Breaking

• Replace Orchestrator with Undertaker (9fda7b4)

New

• Add the --verify flag (abd73b7) - Closes #535

Update

• Remove gulp-util & depend on unpublished gulp-cli (6095f35)
• Improve gulp.watch implementation & tests (9abb0a4)
• Replace inline CLI code with gulp-cli dependency (f0942aa)

Docs

• Add "Rollup with rollup-stream" recipe. (b42acd9)
• Add npm init step to Getting Started (71953b5)
• Add backers and sponsors from OpenCollective (347ed5a)
• Fix grammar in dealing-with-streams.md (de1acf6)
• Create issue template to cover common issues (4d1a8a8)
• Fix broken gulp-header/gulp-footer links (54169eb) - Closes #1851 #1854
• Update browserify-uglify-sourcemap recipe with clarification (6899a6c)
• Clarify CLI semantics when listing more than one task (62323fc)
• Fix issue with formatting in dealing-with-streams.md (a2badd6) - Closes #1948
• Fix sub-lists in writing-a-plugin guidelines (d634e95) - Closes #1955
• Add "Getting Started with Gulp" to books section (a0ec3ff)
• Integrate pump documentation from gulp-uglify (45adfc3) - Closes #1791
• Remove link to Spanish documentation that no longer exists (24914f3)
• Replace BetterError with plugin-error reference (58b2945)
• Fix a broken header in writing-a-plugin (5df0865) - Closes #1984
• Improve "Getting Started" (c95e09e)
• Improve link descriptions (c4d219e)
• Recipe for running gulp via cron task (2c6d551)
• Change jade references to pug (81fc26d)
• Specify where to create package.json (4f9465a)
• Fix and improve Transform example in writing-a-plugin docs (4b118b9)
• Update urls to https (ff4e719)
• Update browserify links (260d5c4)
• Remove duplicate "the" typo (5368d2c)
• Add 4.0 changelog (d331a4e)
• Update syntax in readme example (f787ba5)
• Update changelog (2d0fa20)

Upgrade

• Update undertaker (6830560)

Build

• CI test under node version 5 and 6 (3623061)
• CI test under node version 7 and 8 (f1f7d77)