Bump version 0.42.0

Author: DavidAnson

README.md

@@ -139,7 +139,7 @@ To run `markdownlint-cli` as part of a [pre-commit][pre-commit] workflow, add so
 
 ```yaml
 - repo: https://github.com/igorshubovych/markdownlint-cli
-  rev: v0.41.0
+  rev: v0.42.0
   hooks:
   - id: markdownlint
 ```