Testing

[ahueck]

• Extended testing, e g.,
  • Use of sanitizer
  • CI adapted to check various configurations of TypeART
• Can be build (and run -- at least lit-suite) with Clang libcxx TypeART build using libc++ #60
• Bug fixes
  • see Segfault when (thread) CounterStats is called with empty vector #67 Overflow in TypeResolution when calculating base type (undefined behavior) #65 TypeDB check for built-in type id has no lower bound check #63 error: no member named '_Link_type' in std::map<K,V>::iterator #58
• Include what you use (partially)