v0.6.0

• add support for using system dependencies (thanks Gregor Jasny [email protected])
• improve various documentation pieces (thanks Jerry Crunchtime [email protected])
• fix memory leak in Family (thanks Jerry Crunctime [email protected])
• replace cpr with plain libcurl (thanks Gregor Jasny [email protected])
• remove some dead code (thanks Jerry Crunchtime [email protected])
• make labels orderable (thanks Martin Unzner [email protected])
• add support for building with --std=gnu++17 (thanks Romain Geissler [email protected])
• lots of smaller cleanups (thanks Jerry Crunchtime [email protected])
• numerous improvements to CMake and Bazel (thanks Gregor Jasny [email protected])