Sequence attributes should be homogeneous but we allow booleans and integers in the same sequence

[owais]

Steps to reproduce

from opentelemetry import trace
from opentelemetry.sdk.trace import Resource, TracerProvider, SpanLimits
from opentelemetry.sdk.trace.export import (
    SimpleSpanProcessor,
    ConsoleSpanExporter,
)

provider = TracerProvider()
processor = SimpleSpanProcessor(ConsoleSpanExporter())
provider.add_span_processor(processor)
trace.set_tracer_provider(provider)


tracer = trace.get_tracer(__name__)


with tracer.start_as_current_span("s1", attributes={"k": [1, True]}):
    pass

What is the expected behavior?

❯ python main.py
Mixed types int and bool in attribute value sequence
{
    "name": "s1",
    "context": {
        "trace_id": "0xf38bc0cff3b8d48ac7ca25d7f907c045",
        "span_id": "0xc220c0bb6ad3b802",
        "trace_state": "[]"
    },
    "kind": "SpanKind.INTERNAL",
    "parent_id": null,
    "start_time": "2021-08-17T09:32:11.894501Z",
    "end_time": "2021-08-17T09:32:11.894567Z",
    "status": {
        "status_code": "UNSET"
    },
    "attributes": {},
    "events": [],
    "links": [],
    "resource": {
        "telemetry.sdk.language": "python",
        "telemetry.sdk.name": "opentelemetry",
        "telemetry.sdk.version": "1.4.1",
        "service.name": "unknown_service"
    }
}

What is the actual behavior?

❯ python main.py
{
    "name": "s1",
    "context": {
        "trace_id": "0xe46df9563d1c390fb8b6d8fb7e49036d",
        "span_id": "0x32a92ead98330ec7",
        "trace_state": "[]"
    },
    "kind": "SpanKind.INTERNAL",
    "parent_id": null,
    "start_time": "2021-08-17T09:30:54.912310Z",
    "end_time": "2021-08-17T09:30:54.912332Z",
    "status": {
        "status_code": "UNSET"
    },
    "attributes": {
        "k": [
            1,
            true
        ]
    },
    "events": [],
    "links": [],
    "resource": {
        "telemetry.sdk.language": "python",
        "telemetry.sdk.name": "opentelemetry",
        "telemetry.sdk.version": "1.4.1",
        "service.name": "unknown_service"
    }
}