adaptive_permtest_ts: Two-sample adaptive permutation test
In floatofmath/adaperm: Permutation tests for adaptive designs

Adaptive decision rule

1 2	adaptive_permtest_ts(x, y, n1, n, ne, m1 = n1, m = m, me = me, test_statistic, perms = 50000, alpha = 0.025)

`x`	Observations control group
`y`	Observations treatment group
`n1`	First stage sample size
`n`	Pre-planned total sample size
`ne`	Extended sample size
`m1`	First stage sample size
`m`	Pre-planned total sample size
`me`	Extended sample size
`perms`	Maximum number of permutations to use when computing permutation p-values and conditional error rates