0.1.11

• Updated @polkadot/api to 1.8.1.
• New endpoint for submitting signed transactions:

---

• /tx/ submit a signed transaction, excepts a string with hex-encoded signed transaction in a json POST body:

  curl localhost:8080/tx/ -X POST --data '{"tx": "0x..."}' -H 'Content-Type: application/json'
  

  Expected result is a json with transaction hash:

  {
      "hash": "..."
  }