evm_increaseTime does not follow ETH-RPC conventions

[thomaseizinger]

Expected Behavior

evm_increaseTime takes HEX-encoded input as per convention of the ETH-RPC API: https://github.com/ethereum/wiki/wiki/JSON-RPC#hex-value-encoding

Current Behavior

evm_increaseTime takes an integer.

curl -X POST \
  http://localhost:7545 \
  -H 'Cache-Control: no-cache' \
  -H 'Content-Type: application/json' \
  -H 'Postman-Token: 03c3b093-c447-4698-8b23-371da88e0dd3' \
  -d '{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "evm_increaseTime",
    "params": [
      100000
  ]
}'