C++17 compatible and misc fixes
What's Changed
Default C++ standard remains C++14
- Fix LLNL CI by @nychiang in #663
- C++17 support: compile -Wall/-Werror proof by @tepperly in #653
- Fix a bug in copying an empty matrix into a bigger matrix by @nychiang in #666
- Fix the approach used to update mu by @nychiang in #664
Full Changelog: v1.0.0...v1.0.1