Version 2.1.0

• Support passing additional flags to valgrind via the VALGRINDFLAGS env var (thanks @Avuxo, @ki7dk)
• Deploy releases automatically, including build artifacts (thanks @Luni-4)
• Accept more Valgrind XML output (leading to fewer panics) (thanks @TheWastl)
• Update dependencies including a fix for a vulnerability in regex (which didn't affect this crate, though)
• Fix typos (thanks @wiktor-k, @krystian-wojtas)