FIAT 2018.1.0 was released on 2018-06-14.
Remove Python 2 support
Generalize Bubble element to CodimBubble to create bubbles on entity of arbitrary codimension; add FacetBubble, keep Bubble (as bubble on cell)
Bubble
CodimBubble
FacetBubble
Changes in version 2019.1.0
Changes in version 2017.2.0