v1.13.1

FixedEffectModels v1.13.1

Diff since v1.13.0

Merged pull requests:

• Add drop_singletons option to partial_out() (#263) (@droodman)
• Fix edge-case prediction paths and expand regression tests. (#277) (@matthieugomez)

Closed issues:

• PPML with high-dimensional fixed effects? (#143)