v5.3.0

AbstractMCMC v5.3.0

Diff since v5.2.0

Merged pull requests:

• New workflow for adding navigation bar (#141) (@shravanngoswamii)
• Trigger DocsNav.yml on push to gh-pages (#142) (@shravanngoswamii)
• Update DocsNav.yml (#143) (@yebai)
• Add error hint for MethodErrors on LogDensityModel (#146) (@penelopeysm)