relax asdf dependency

Merge pull request #48 from symmetryinvestments/relax_asdf_version

relax asdf version and dub upgrade

relax vibe-d dependency

Merge pull request #47 from symmetryinvestments/relax_vibe

relax vibe dependency and dub upgrade

Fixes for unit-threaded update

Merge pull request #46 from symmetryinvestments/fix-45

Fix #45

remove unit-threaded dependency outside of internal tests

Merge pull request #44 from symmetryinvestments/no_version_unittest

don't use version(unittest)

Compatability with asdf 0.6.x

Introduces mir dependency which caused some problems before, so bumping minor version number

No more unintentional mir dependency

Merge pull request #42 from symmetryinvestments/separate_integration

move integration tests out of main dub.json

Compatibility with asdf 0.5.0

Merge pull request #38 from symmetryinvestments/upgrade_asdf

upgrade asdf