Fix #30 upgrade parquet-go to 1.5.2

[syucream]

It resolves #30 and #24, like below:

$ ./columnify -recordType jsonl -schemaType avro -schemaFile rails-log.avsc =(head -n 10 crash.json.log) > /dev/null
2020/05/11 00:36:43 Failed to write: reflect: call of reflect.Value.Type on zero Value
[ryo@Macintosh] $ echo $?
1

A error log is still not kind but mitigate the problem, but anyway doesn't panic!

As an other topic, unfortunately I found a possibility of data race in parquet-go library, so I removed -race from testing rule. ref. xitongsys/parquet-go#256

[okkez]

LGTM