4.2.4

• [CVE-2021-27938] Prevent echoing request variable (Steve Boyd) - 4c8aa39
• Use tagged versions for 1.x recipe-cms, use trusty (Steve Boyd) - a70e5f5
• Remove phpcs runs from 4.0 branch, code not compliant (Robbie Averill) - e6e1827
• Add phpcs ruleset from 4.4 branch (Robbie Averill) - bd6a48a
• Add codesniffer to dev dependencies (Robbie Averill) - 4e1bb1f
• Update Travis configuration (Robbie Averill) - e01a2b6
• Remove use of deprecated DB::getConn() and run import optimisation (Robbie Averill) - b7b5624
• Fix(mutex) make the mutex update check for finished or running jobs (Stephen McMahon) - 0b39d8c
• Fix(QueuedJobService): Valid $messages data being overwritten (jcarter) - e91c358
• FIX Remove _config.php check for folder name - it is a vendor module now (Robbie Averill) - 4b967a0
• Provide legacy class-name map for SilverStripe 4 (Fred Condo) - 011ffe1
• add(Readme): Info for query_limit config option (jcarter) - 437dd2f
• add(CleanupJob): query_limit config option (default 100k) (jcarter) - 78ebf99
• FIX Replace Convert JSON methods with json_* methods, deprecated from SilverStripe 4.4 (Robbie Averill) - ab87aa1
• FIX Add queuedjobs test state to disable the shutdown handler during unit tests (Robbie Averill) - f3d8a47
• Ensure compatibility with SS 3.7 & PHP 7.2 (Marc Espiard) - 267b8da
• FIX Remove use of deprecated DB::getConn(), update broken doc blocks etc (Robbie Averill) - d82876c
• FIX Doorman's 'is cancelled' criteria now included completed jobs, preventing infinite processes (Robbie Averill) - 3962190
• Updated test that sometimes fails to have a little leniency (Guy Marriott) - 1a2bcba