Overhaul crypto (Schnorr/Ristretto, HDKD, BIP39) (#1795)

* Rijig to Ristretto

* Rebuild wasm

* adds compatibility test with the wasm module

* Add Ed25519-BIP39 support

* Bump subkey version

* Update CLI output

* New keys.

* Standard phrase/password/path keys.

* Subkey uses S-URI for secrets

* Move everything to use new HDKD crypto.

* Test fixes

* Ignore old test vector.

* fix the ^^ old test vector.

* Fix tests

* Test fixes

* Cleanups

* Fix broken key conversion logic in grandpa

CC @rphmeier

* Remove legacy Keyring usage

* Traitify `Pair`

* Replace Ed25519AuthorityId with ed25519::Public

* Expunge Ed25519AuthorityId type!

* Replace Sr25519AuthorityId with sr25519::Public

* Remove dodgy crypto type-punning conversions

* Fix some tests

* Avoid trait

* Deduplicate DeriveJunction string decode

* Remove cruft code

* Fix test

* Minor removals

* Build fix

* Subkey supports sign and verify

* Inspect works for public key URIs

* Remove more crypto type-punning

* Fix typo

* Fix tests

substrate/subkey/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "subkey"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"
 
@@ -12,6 +12,7 @@ tiny-bip39 = "0.6.0"
 rustc-hex = "2.0"
 substrate-bip39 = { git = "https://github.com/paritytech/substrate-bip39" }
 schnorrkel = { git = "https://github.com/w3f/schnorrkel" }
+hex = "0.3"
 
 [features]
 bench = []