fake commit
Add old collection tests

TODO
* Make a benchmark that runs all data structures (for not to comment/uncomment anymore)
* SortedMap optimization (first/last), try KVP with single array
* Investigate and fix why SHM is so much slower than the test `Nested sorted list - optimized`, SHM is implemented as in the test

BACKLOG
* Test TimePeriod with FsCheck-like millions of inputs