Re-implementation of Patricia-Merkle Trie (#203)

* Start of trie-db re-implementation

* WIP commit

* More WIP

* WIP, seems complete, untested

* Ported trie-db operational

* Add Ethereum trie tests

* Use u8aConcat to construct u8a

* Basic RocksDb interface

* Combine engines into DB, expand tests

* Update Trie with transaction wrapper

* LevelDb (sync) interface

* Remove unused (for now) package (compatibility)

* trie-d -> trie-db-old, trie-db-ext -> trie-db

* Version bump

* Skip old trie tests (package to be removed)

* Skip tests (fixed)

* Remove non-used RocksDb spec

* Skip FileFlat tests (deprecated?)

packages/util-keyring/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/util-keyring",
-  "version": "0.28.25",
+  "version": "0.29.0",
   "description": "Keyring management",
   "main": "index.js",
   "engines": {
@@ -31,8 +31,8 @@
   "homepage": "https://github.com/polkadot-js/client/tree/master/packages/util-keyring#readme",
   "dependencies": {
     "@babel/runtime": "^7.0.0-rc.1",
-    "@polkadot/util": "^0.28.25",
-    "@polkadot/util-crypto": "^0.28.25",
+    "@polkadot/util": "^0.29.0",
+    "@polkadot/util-crypto": "^0.29.0",
     "@types/bs58": "^3.0.30",
     "bs58": "^4.0.1"
   }