v2.0.1

• Update w3f/schnorrkel to 0.8.5 (Full Substrate 2.x support, no 1.x support)
• Remove Alice session (ed2551) account from testing keyring (not applicable to Substrate 2.x)
• Remove chainspec, db, trie-codec, trie-db and trie-hash packages (moved to client)
• Renamed assertSingletonPackage to detectPackage with inclusion of version listing
• Swap to elliptic library for secp256k1 recovery (No node bindings)