chainladder 0.8.11-alpha

Bug Fixes:

• #239 val_to_dev bug fixed
• #254 Fixed an undesired mutation when using cl.concat
• #257 to_frame bug fix on empty triangles
• #248 to_frame bug and deprecation notice in origin_as_datetime argument.
• #250 Bug fix in triangle initialization
• #258 Addressed silent error when predicting on a Triangle that is larger than the underlying model.
• #261 Addressed a pandas>1.4.0 bug

Enhancements

• Introduced ExpectedLoss method
• #242 Added threshold based dropping of link ratios to Development estimator
• #158 Triangles can now be instantiated with only one data point.
• #250 python 3.10 support
• #260 fillna method added to Triangle class that supports filling with constants or other Triangles.