* Add new ACTS releases
* Update ACTS dependency requirements
* We can actually be more specific here
* The material plugin is gone as of ACTS v0.10.0
* Add 0.10.4 release
* Remove material mapping plugin
It was merged into core as of 0.10.x, and given ACTS' youth it is unlikely to have actual users at this point in time.
* Also add version 0.10.0
* Add leading '0' to 0.9.x versions (e.g. 0.09.1) and 0.8.x versions
* Don't mention acts-framework, that package isn't in Spack yet
* Improve C++ standard computation in ACTS package
* Use a more clever strategy for aligning ACTS cxxstd with ROOT cxxstd
* Add new ACTS releases
* ACTS is not compatible with the new Boost CMake build system yet
* Explain why Boost 1.70 does not work currently
