perl v5.40.0 released

Version 5.40.0 of the Perl language has been released. "Perl 5.40.0represents approximately 11 months of development since Perl 5.38.0 andcontains approximately 160,000 lines of changes across 1,500 files from 75authors". Significant changes include a new __CLASS__keyword, a :reader: attribute for field variables, a new"^^" logical-XOR operator (because two of those were not enough),moving "try/catch" out of the experimental category, and more; seethispage for lots of details.