Gulp 4 (alpha) fails

Understandable as Gulp 4 hasn't been officially released, however in testing the following failure is emitted:
```
/home/xxx/.npm-global/lib/node_modules/gulp-ssh-deploy/dist/index.js:93
if (!self.mGulp.tasks.hasOwnProperty(self.mOptions.package_task)) {
^

TypeError: Cannot read property 'hasOwnProperty' of undefined
at GulpSSHDeploy (/home/xxx/.npm-global/lib/node_modules/gulp-ssh-deploy/dist/index.js:93:26)
at Object. (/home/xxx/Websites/xxx-me-2/gulp_tasks/ssh.js:22:1)
at Module._compile (module.js:571:32)
at loader (/home/xxx/Websites/xxx-me-2/node_modules/babel-register/lib/node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (/home/xxx/Websites/xxx-me-2/node_modules/babel-register/lib/node.js:154:7)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Function.Module._load (/home/xxx/Websites/xxx-me-2/node_modules/gulp-hub/lib/load-subfile.js:26:32)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at module.exports (/home/xxx/Websites/xxx-me-2/node_modules/gulp-hub/lib/load-subfile.js:30:4)
at /home/xxx/Websites/xxx-me-2/node_modules/gulp-hub/lib/hub-registry.js:57:30
at arrayEach (/home/xxx/Websites/xxx-me-2/node_modules/gulp-hub/node_modules/lodash/index.js:1289:13)
at Function. (/home/xxx/Websites/xxx-me-2/node_modules/gulp-hub/node_modules/lodash/index.js:3345:13)
at HubRegistry.init (/home/xxx/Websites/xxx-me-2/node_modules/gulp-hub/lib/hub-registry.js:55:4)

```