bump nimble version to 0.2.6

Auto-animation API (#40)

* refactor and implement autoAnimateSlides template

* change name to showAt and introduce showUntil and showFrom

* save progress

* write auto-animate docs

* update to reveal.js version 5.0.4

Merge pull request #34 from HugoGranstrom/nimv2

add converter from new default set type

Merge pull request #32 from HugoGranstrom/fixDraculaPlusUseSets

Fix dracula + Use sets for `animateCode`

columns and adaptiveColumns update

rebuild docs

Merge pull request #11 from HugoGranstrom/update-0.2

Update 0.2

add mp4 showcase