MiningCore doesn't working with tdxminer.
### Description

Tdxminer can't connect to MiningCore pool. It throws an error: 

```
Pool gin.wingpool.com failed to parse server rpc: 
{"jsonrpc":"2.0","method":"mining.set_difficulty","params":[0.1]}
```
It looks like MiningCore doesn't following JSON-RPC specefication (id property ?).

### Steps to Reproduce

1. Install MiningCore (with lyra2z support from my fork)
2. Try to start mining using tdxminer

### Expected behavior

Mining should be started

### Actual behavior

```
Pool gin.wingpool.com failed to parse server rpc: 
{"jsonrpc":"2.0","method":"mining.set_difficulty","params":[0.1]}
```

### Reproduces how often

100%

### Version

Fork of release branch with lyra2z algorithm. (i haven't made any changes in RPC part)

### Additional Information


