Debian node-js-yaml: js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.0, when me…

js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.0, when merge keys are enabled, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in version 5.2.0.