ptiede/Comrade.jl: v0.8.0

Diff since v0.7.8

Closed issues:

• Slowdown with plotting a model image for certain difficult options (#261)
• Image edge effects (#291)

Merged pull requests:

• Separate out the eht-imaging dependency (#297) (@ptiede)
• CompatHelper: bump compat for StatsBase to 0.34, (keep existing compat) (#298) (@github-actions[bot])
• CompatHelper: add new compat entry for Requires at version 1, (keep existing compat) (#300) (@github-actions[bot])
• CompatHelper: add new compat entry for JLD2 at version 0.4 for package ComradeAHMC, (keep existing compat) (#301) (@github-actions[bot])
• Allow AHMC to save directly to disk (#302) (@ptiede)