nlmixr2est 2.1.4

Breaking change, now calculate condition number based on covariance
and correlation, the names have changed to be more explicit.
conditionNumber changed to conditionNumberCov and a new metric
conditionNumberCor has been added.
A bug in boundary value detection prevented automatic covariance calculation
with FOCEi estimation (#318)
Fix vpcSim so that it will be a bit more robust when it is
difficult to simulate.
A bug in model piping which did not allow models to be appended to was fixed
(rxode2#364)
An internal change was made in nlmixr2.rxUi() to better support the
babelmixr2 PKNCA estimation method (babelmixr2#75)
Fixed bug where $iniUi did not return the initial ui when running
non focei related methods. Also added alias of $uiIni to the
same function.
Dropped Stan headers for this package, also updated to C++17

What's Changed

289 issue in obtaining model estimates by @mattfidler in #290
Fix rxode2 #364 by @billdenney in #292
Remove debugging statement by @billdenney in #299
Make some focei methods for simulation that are closer to est model by @mattfidler in #308
302 mu reference definition isnt correct for non mu referenced model by @mattfidler in #304
Fallback to old method by @mattfidler in #310
drop stan headers and eigen by @mattfidler in #319
318 fix bound by @billdenney in #321
Make package installation consistent; fix typos; use label() by @billdenney in #325
Speed up some testing by minimizing the fit iterations by @billdenney in #324
Allow for babelmixr2::pkncaControl() not to set genRxControl by @billdenney in #326
311 condition numbers by @mattfidler in #323
316 wrong initial values in nlmixr2 object by @mattfidler in #322
Rebuild documentation by @billdenney in #329

Full Changelog: v2.1.3...v2.1.4