csdiff-3.4.0

• msg-filter: abstract out notes about builtin models (#189)
• msg-filter: abstract out numbers from error[too-many] findings (#188)
• csgrep --warning-rate-limit: drop location from key events (#185)
• parser-cov: accept the [important] flag in checker line (#186)
• msg-filter: adapt paths from llvm-17 source tree to match llvm-19 (#183)
• parser-gcc: fix parsing of UBSAN reports with missing function names (#184)
• parser: skip BOM at the beginning of input (#182)
• html-writer: use CSS instead of inlining styles (#174)
• html-writer: use HTML5 instead of XHTML 1.0 (#177)