* Update fuzzers to new Atheris version
* Pin new atheris version
* Change = to ==
* Change path where Atheris fuzzers ld_preload from
* Update hypothesis fuzzer to work with new atheris
* Set version to 2.0.1
* Switch to Atheris 2.0.4
* Correct spelling of pygments_fuzzer decorator
* instrument yaml_reader
* Change to latest Atheris
* Set atheris version to 2.0.6
* Add BeautifulSoup
BeautifulSoup is the standard to parse untrusted/invalid/weird
html in Python, so fuzzing it for unexpected exceptions and
infinite loops makes sense. Moreover,
it's using various parsers, with some of them written in C.
* Update the building script
* ValueError is also a valid exception