Use custom hasher for Map (#857)

* Use blake2 instead of two_x

* Add v4

* Update to new v4 static

* Update json

* Revert

* Use hasher enum

* Fix metadata v4 test

* Fix metadata v4 test

* Fix versioned metadata

* refactor & clean

* Use consistent naming

* Make jsons consistent

* Add backward compat

* Fix tests

* Start working on type-storage

* Fix output

* Grumble

* Update to latest static

* Clean code

* Fix imports

* Remove useless imports

* Fix tests

* Use prettier output for toJSON in metadata

* Implement different hashers

* Remove generic storageKey

* Bump version

* Add backwards-compat

* Fix hashing function, use Twox128

* Grumbles

* Add tests

packages/types/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "0.77.0-beta.7",
+  "version": "0.77.0",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "keywords": [