math/cvc4: update to 1.7
ChangeLog:
https://github.com/CVC4/CVC4/releases/tag/1.7
- New Features: Proofs: Support for bit-vector proofs with eager bitblasting Strings: Support for str.replaceall operator. New option --re-elim SyGuS: Support for abduction (--sygus-abduct)
- Improvements: Strings: Significantly better performance
- Changes: API change: Expr::iffExpr() is renamed to Expr::eqExpr() Compiling the language bindings now requires SWIG 3 instead of SWIG 2. The CVC3 compatibility layer has been removed. The build system now uses CMake instead of Autotools