fix(doc-gen): Run Gulp on Windows too
Using node_module/.bin/gulp will enable to gulp command to run
both on Windows and Linux. In its current form, opening a Javascript
file on Windows will not run the doc generation

Otherwise will give the following error on Windows

Running "docs" task
'node_modules' is not recognized as an internal or external command,
operable program or batch file.
Warning: doc generation failed Use --force to continue.