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CLN: Update LICENCES and reference where used (#54743)
copy license text from: tidyverse/haven (#32756)
Add reader for SPSS (.sav) files (#26537)
PERF: branchless calendar algorithms and batch field extractors (#64662)
PERF: Cythonize kendall correlation (#65632)
BLD: Add xsimd Dependency and SIMD detection (#65471)