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/core/primitives/Cargo.toml

@@ -27,6 +27,8 @@ rand = { version = "0.6", optional = true }
 sha2 = { version = "0.8", optional = true }
 substrate-bip39 = { git = "https://github.com/paritytech/substrate-bip39", optional = true }
 tiny-bip39 = { version = "0.6.0", optional = true }
+hex = { version = "0.3", optional = true }
+regex = {version = "1.1", optional = true }
 
 [dev-dependencies]
 substrate-serializer = { path = "../serializer" }
@@ -55,6 +57,7 @@ std = [
 	"ring",
 	"untrusted",
 	"hex-literal",
+	"hex",
 	"base58",
 	"substrate-bip39",
 	"tiny-bip39",
@@ -63,4 +66,5 @@ std = [
 	"rand",
 	"sha2",
 	"schnorrkel",
+	"regex",
 ]