Counts in ClassicHistogramBuckets cannot be negative throws when using SimpleclientCollector bridge

[turchenkoalex]

If I use non-integer numbers in buckets for a classic histogram, an error is thrown when scraping metrics

Sample code to reproduce the error

package io.prometheus.metrics.simpleclient.bridge;

import io.prometheus.client.CollectorRegistry;
import io.prometheus.client.Histogram;
import io.prometheus.metrics.model.registry.PrometheusRegistry;

public class Test {
    public static void main(String[] args) {
        CollectorRegistry origRegistry = new CollectorRegistry();
        PrometheusRegistry newRegistry = new PrometheusRegistry();
        SimpleclientCollector.builder()
                .collectorRegistry(origRegistry)
                .register(newRegistry);

        Histogram histogram = Histogram.build()
                .name("response_size_bytes")
                .help("response size in Bytes")
                .labelNames("status")
                .buckets(0.01, 0.1)
                .register(origRegistry);

        histogram.labels("200").observe(1);

        newRegistry.scrape(); // throws IllegalArgumentException: Counts in ClassicHistogramBuckets cannot be negative.
    }
}