v0.4.0

• Update 0 and 1 constant bits by the ones froom the icek collection (by @Obijuan)
• Update Mux 2:1 from icemux collection (by @Obijuan)
• Update gates from the icegates collection (by @Obijuan)
• Update debouncer from the iceinput collection (by @Obijuan)
• Update DFF and tFF from iceFF collection (by @Obijuan)
• Update tri-state from iceio collection (by @Obijuan)
• Update pull-up from the iceio collection (by @Obijuan)
• Update all the examples (by @Obijuan)

Full Changelog: v0.3.4...v0.4