Add a code of conduct

Source: R/code-of-conduct.R

Adds a CODE_OF_CONDUCT.md file to the active project and lists in .Rbuildignore, in the case of a package. The goal of a code of conduct is to foster an environment of inclusiveness, and to explicitly discourage inappropriate behaviour. The template comes from https://contributor-covenant.org, version 1: https://contributor-covenant.org/version/1/0/0.

use_code_of_conduct(path = NULL)

Arguments

path

Path of the directory to put CODE_OF_CONDUCT.md in, relative to the active project. Passed along to use_directory(). Default is to locate at top-level, but .github/ is also common.