Fix getBridgeProver method

[pustovalov]

get_bridge_provider was changed in this PR: https://github.com/aurora-is-near/aurora-engine/pull/62/files

Also waiting for this PR to return some value: aurora-is-near/aurora-engine#581

Before

$ node lib/aurora.js get-bridge-prover --network mainnet
/Users/pavel/Library/pnpm/global/5/.pnpm/near-api-js@0.39.0/node_modules/near-api-js/lib/providers/json-rpc-provider.js:80
            throw new errors_1.TypedError(`Querying ${args} failed: ${result.error}.\n${JSON.stringify(result, null, 2)}`, rpc_errors_1.getErrorTypeFromErrorMessage(result.error));
                  ^

TypedError: Querying [object Object] failed: wasm execution failed with error: FunctionCallError(MethodResolveError(MethodNotFound)).
{
  "block_hash": "B8Re2P2JyN62UFM6EBAjNBJorLeVQ81dE7dyhScZLKdC",
  "block_height": 72211849,
  "error": "wasm execution failed with error: FunctionCallError(MethodResolveError(MethodNotFound))",
  "logs": []
}
    at JsonRpcProvider.query (/Users/pavel/Library/pnpm/global/5/.pnpm/near-api-js@0.39.0/node_modules/near-api-js/lib/providers/json-rpc-provider.js:80:19)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async Engine.callFunction (file:///Users/pavel/Library/pnpm/global/5/.pnpm/github.com+aurora-is-near+aurora.js@9845b0f/node_modules/@aurora-is-near/engine/lib/engine.js:293:24)
    at async Engine.getBridgeProvider (file:///Users/pavel/Library/pnpm/global/5/.pnpm/github.com+aurora-is-near+aurora.js@9845b0f/node_modules/@aurora-is-near/engine/lib/engine.js:157:17)
    at async Command.<anonymous> (file:///Users/pavel/Library/pnpm/global/5/.pnpm/@auroraisnear+cli@0.0.3/node_modules/@auroraisnear/cli/lib/aurora.js:71:28) {
  type: 'UntypedError',
  context: undefined
}

After

$ node lib/aurora.js get-bridge-prover --network mainnet
┌───────────────┐
│ bridge_prover │
├───────────────┤
│               │
└───────────────┘

$ node lib/aurora.js get-bridge-prover --network testnet
┌───────────────────────┐
│         bridge_prover │
├───────────────────────┤
│ prover.goerli.testnet │
└───────────────────────┘

[0x3bfc]

LGTM, however can you fix the lint issues ?

[pustovalov]

#45

[spilin]

LGTM