Update README.md

Author: Overseven

README.md

@@ -57,9 +57,10 @@ Khala chain
 ## TODO
 - [x] parse and display chain name / genesis hash
 - [x] blind sign for not parsed method case
+- [x] build on Mac M1
 - [x] `balances::transfer` method for Polkadot chain
 - [ ] other methods for `balances` pallet for Polkadot chain
 - [ ] other chains
 - [ ] derivation path settings
 - [ ] Ledger Stax support
-- [ ] tests
+- [ ] tests