support dict as a parameter value

[swilly22]

params = {'props': {'v2': 10}}
result = graph.query("MATCH (n) SET n = $props RETURN n", params)

Need to remove ' from dict keys within build_params_header as Cypher doesn't expects dict keys to be wrapped in quotation marks.

[AvitalFineRedis]

@swilly22 Can you please write how the params in the example here look in the query?

[AvitalFineRedis]

CYPHER props={v2:10} ?