Documentation fix

• Documentation fix (r-lib/roxygen2#1491).

• Accepted to CRAN on 1/23/24.

Minor updates

CGGP 1.0.3

• Minor fixes.

• Added rmarkdown to Suggests to avoid being removed from CRAN.

• Accepted to CRAN on 5/8/2021.

Fixed examples

Fixed errors in examples.

Changed default correlation

Changed default correlation function to power exponential, which we have found to be more numerically stable.

Accepted to CRAN on 6/16/2019.

Initial release

First release of CGGP, version v1.0.0.

Accepted to CRAN on 6/13/2019.