ClickHouseRowMetadata index should start at 0

[murzart]

Describe the bug

ClickHouseRowMetadata is starting the index at 1, but the index should be starting at 0, according to the spec.

Expected behaviour

Should work according to spec. Index should start at 0.

Code example

    for (int i = 0; i < rowMetadata.getColumnMetadatas().size(); i++) {
      String name = rowMetadata.getColumnMetadata(i).getName(); // failing at 0.. i + 1 works
      Object value = row.get(i); // works fine

      map.put(name, value);
    }

Error log

java.lang.IllegalArgumentException: -1
        at java.util.stream.ReferencePipeline.skip(ReferencePipeline.java:575) ~[?:?]
        at com.clickhouse.r2dbc.ClickHouseRowMetadata.getColumnMetadata(ClickHouseRowMetadata.java:24) ~[clickhouse-r2dbc-0.4.6.jar:clickhouse-r2dbc 0.4.6 (revision: dd91e17)]
        ...

Configuration

Environment

• clickhouse-jdbc version: 0.4.6

[zhicwu]

Thank you @murzart for the reporting the issue. Will raise a PR to fix this.