fix: respond to CVE-2017-18342
fix: respond to CVE-2017-18342

CVE-2017-18342 (https://nvd.nist.gov/vuln/detail/CVE-2017-18342)

high severity
Vulnerable versions: < 4.2b1
Patched version: 4.2b1
In PyYAML before 4.1, the yaml.load() API could execute arbitrary code.
In other words, yaml.safe_load is not used.

RobinNil/file_read_backwards,robin81/file_read_backwards