* Add new IntHashMap and IntMap natives
This is a continuation of #579.
[HashMap] Adds new IntHashMap and IntMap natives.
This patch makes the following changes
* Refactors StringHashMap to a generic HashMap template
* Adds the IntHashMap class
* Adds new IntMap natives
* Adds IntMap tests to the tries test suite
[HashMap] Reverted rename of CharsAndLength
[HashMap] Use more descriptive template names
[HashMap] Removed old-style natives
[HashMap] Removed IntHash class
[HashMap] Reverted some search & replace errors
Co-authored-by: Geoffrey McRae <geoff@hostfission.com>
* Fix spelling mistake + include
* Fix tries test
* Update tests with clone + ContainsKey
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Co-authored-by: Geoffrey McRae <geoff@hostfission.com>
Co-authored-by: Nicholas Hastings <nshastings@gmail.com>
