Release 5.3.1

• Released 5 March 2024.
• Assembler: After comments, treat \r\n line ends the same as \n. This makes testing easier.
• Bash: Fix folding when line changed to/from comments and previous line is commented. Issue #224.
• Batch: Fix handling ':' next to keywords. Issue #222.
• JavaScript: in cpp lexer, add lexer.cpp.backquoted.strings=2 mode to treat ` back-quoted strings as template literals which allow embedded ${expressions}. Issue #94.
• Python: fix lexing of rb" and rf" string. Issue #223, Pull request #227.
• Ruby: fix lexing of methods on numeric literals like '3.times' so the '.' and method name do not appear in numeric style. Issue #225.