v1.4.0

What's Changed

• Enhancement/yaml formatting by @ajshajib in #164
• Implement ability for user to supply custom likelihood function by @ahuang314 in #166
• Add time_delay_likelihood support by @brady-ryan in #167
• Add multi_plane support by @brady-ryan in #170
• Add flexion lens mass model by @brady-ryan in #172
• Add model_options, likelihood_options, constraints_options by @ajshajib in #171
• Add general_scaling special option support by @brady-ryan in #173

Full Changelog: v1.3.0...v1.4.0