NIMBLE version 1.2.1 released

[Chris Paciorek]

We've released version 1.2.1 of nimble.

This is a micro release that primarily addresses some packaging changes requested by CRAN. In addition, this release includes:

• A multinomial MCMC sampler, `sampler_RW_multinomial`, for random variables following a multinomial distribution.
• Some enhancements to error trapping and warning messages.
• A variety of minor bug fixes.

Please see the NEWS file in the installed package for more details.

- Chris Paciorek for the NIMBLE Development Team