prepared artifact for upcoming release v1.4.0
(#11) Performance: updated infrastructure
Merge branch 'feature/11-update-infrastructure'

* feature/11-update-infrastructure:
  (#11) Performance: updated infrastructure
(#11) Performance: updated infrastructure: fixed tests
Merge branch 'feature/11-update-infrastructure'

* feature/11-update-infrastructure:
  (#11) Performance: updated infrastructure: fixed tests
release v1.4.0
Updated gh-pages to release v1.4.0