parcr 0.5.2

Bug fix

• Parser zero_or_one() was not greedy, meaning that it sometimes did not parse
  input that it should be able to parse (see
  issue #12).

New feature

• Added the function Ignore() which reads and discards all elements until the
  end of a vector.

parcr 0.5.1

• Because of the use of base::isa() this package requires R 4.1 or higher,
  not R 2.1. This has been corrected in the DESCRIPTION. Running on
  ubuntu-latest and R 4.1 is checked by CI workflow on Github.
• Minor corrections and additions to both vignettes.

parcr 0.5.0

• All function descriptions and documentation thoroughly reviewed and updated.
• Vignettes reviewed and updated.