Python 3.14

[benjeffery]

No description provided.

[benjeffery]

Need a PR that brings tsdate inline with tskit 1.0 - will do this

[hyanwong]

Now working with tskit 1.0 but failing as below. We can probably just wait and merge when get msprime working with 3.14 / macOS

lib/fenwick.c:31:10: fatal error: 'gsl/gsl_math.h' file not found
         31 | #include <gsl/gsl_math.h>
            |          ^~~~~~~~~~~~~~~~
      1 error generated.
      error: command '/usr/bin/clang' failed with exit code 1

      hint: This error likely indicates that you need to install a library
      that provides "gsl/gsl_math.h" for `msprime@1.3.4`