chore(deps): update dependency gulp to version .x 🌟 (major) (#4816)

* chore(deps): update gulp to 4.0.2 🌟

* remove unused gulp-typescript package

* rename gulpDebug dep for consistency

* remove run-sequence dep - replace with new gulp.sequence and gulp.parallel

* pass new sourcemaps arg through to gulp-coffee

* fix favicon task that I broke. 😬

* fix extension gulpfile - needed those returns :P

- also update vinyl-source-stream to avoid vinyl errors during gulp
tasks

* Fix example gulpfile to allow empty sources


Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: Jennifer Shehane <jennifer@cypress.io>

scripts/binary/build.coffee

@@ -9,7 +9,6 @@ chalk = require("chalk")
 Promise = require("bluebird")
 gulpDebug = require("gulp-debug")
 gulpCoffee = require("gulp-coffee")
-gulpTypeScript = require("gulp-typescript")
 pluralize = require("pluralize")
 vinylPaths = require("vinyl-paths")
 coffee = require("@packages/coffee")
@@ -195,7 +194,7 @@ buildCypressApp = (platform, version, options = {}) ->
 
         ## except those in node_modules
         "!" + distDir("**", "node_modules", "**", "*.coffee")
-      ])
+      ], { sourcemaps: true })
       .pipe vinylPaths(del)
       .pipe(gulpDebug())
       .pipe gulpCoffee({

scripts/binary/upload-npm-package.coffee

@@ -6,7 +6,7 @@ fs = require("fs")
 path = require("path")
 awspublish = require('gulp-awspublish')
 rename = require('gulp-rename')
-debug = require('gulp-debug')
+gulpDebug = require('gulp-debug')
 gulp = require("gulp")
 human = require("human-interval")
 R = require("ramda")
@@ -53,7 +53,7 @@ uploadFile = (options) ->
       la(check.unemptyString(p.basename), "missing basename")
       la(check.unemptyString(p.dirname), "missing dirname")
       p
-    .pipe debug()
+    .pipe gulpDebug()
     .pipe publisher.publish(headers)
     .pipe awspublish.reporter()
     .on "error", reject

scripts/binary/upload-unique-binary.coffee

@@ -6,7 +6,7 @@ fs = require("fs")
 path = require("path")
 awspublish = require('gulp-awspublish')
 rename = require('gulp-rename')
-debug = require('gulp-debug')
+gulpDebug = require('gulp-debug')
 gulp = require("gulp")
 human = require("human-interval")
 R = require("ramda")
@@ -83,7 +83,7 @@ uploadFile = (options) ->
       la(check.unemptyString(p.dirname), "missing dirname")
       key = p.dirname + uploadFileName
       p
-    .pipe debug()
+    .pipe gulpDebug()
     .pipe publisher.publish(headers)
     .pipe awspublish.reporter()
     .on "error", reject

scripts/binary/upload.coffee

@@ -1,6 +1,6 @@
 awspublish  = require('gulp-awspublish')
 rename      = require('gulp-rename')
-debug       = require('gulp-debug')
+gulpDebug   = require('gulp-debug')
 fs      = require("fs-extra")
 cp      = require("child_process")
 path    = require("path")
@@ -118,7 +118,7 @@ module.exports = {
         .pipe rename (p) ->
           p.dirname = aws.folder + "/" + p.dirname
           p
-        .pipe debug()
+        .pipe gulpDebug()
         .pipe publisher.publish(headers)
         .pipe awspublish.reporter()
         .on "error", reject