release v0.8.0

chore: prep v0.7.0 release (noahgorstein#94)

docs: 0.6.0 updates (noahgorstein#58)

chore: prep v0.5.0 release (noahgorstein#44)

chore(release): bump version to 0.4.0 (noahgorstein#37)

v0.3.0 (noahgorstein#26)

v0.2.0 (noahgorstein#16)

add demo gif to readme