frictionless 1.2.0

Changes for users

• add_resource() now allows to replace an existing resource (#227).
• read_resource() now returns an error if both path and data are provided (#143).
• write_package() no longer writes to "." by default, since this is not allowed by CRAN policies. The user needs to explicitly define a directory (#205).
• null values in a read datapackage.json are now retained by write_package(), rather than being changed to empty lists. Properties assigned by the user to NA and NULL remain being written as null and removed respectively (#203).
• New vignettes vignette("data-package"), vignette("data-resource"), vignette("table-dialect") and vignette("table-schema") describe how frictionless implements the Data Package standard. The (verbose) function documentation of read_resource() and create_schema() has been moved to these vignettes, improving readability and maintenance (#208, #246).
• The included dataset example_package is removed in favour of the function example_package(). This function allows to reproducibly provide a local Data Package, without the need for an internet connection. The observations resource was also changed from a remote to a local resource and from CSV to TSV. This change affects the use of example_package in older versions of frictionless. We recommend to update frictionless to the latest version (#114, #253).

Changes for developers

• read_resource() is now more modular under the hood, which should make it easier to extend (#210).
• checklist tooling was removed, in favour of CITATION.cff for citation and Zenodo deposit (#206).

Other changes

• Add Sanne Govaert as author. Welcome Sanne!