causalsim 0.1.0

Initial CRAN release.

• causalsim() for simulating a dataset in a single call (convenience wrapper around causalsim_dgp() and causalsim_draw())
• causalsim_dgp() for defining causal data generating processes with known ground truth
• causalsim_draw() for simulating individual datasets from a DGP
• causalsim_eval() for evaluating estimator performance over repeated replications
• causalsim_eval_grid() for sweeping evaluation across a Cartesian product of DGP parameters
• causalsim_covar() for specifying covariate distributions and causal roles
• summary() and plot() methods for causalsim_eval results