v1.4.0

FixedEffectModels v1.4.0

Diff since v1.3.1

Merged pull requests:

• CompatHelper: bump compat for "Reexport" to "1.0" (#139) (@github-actions[bot])
• Improve parse_fixedeffect for general usage (#140) (@junyuan-chen)
• Update fit.jl (#141) (@matthieugomez)
• Update Project.toml (#142) (@matthieugomez)