opentelemetry 0.22.0

A metrics collection and distributed tracing framework
Documentation 
# Copyright The OpenTelemetry Authors
# SPDX-License-Identifier: Apache-2.0
# This is used with cargo-check-external-types to reduce the surface area of downstream crates from
# the public API. Ideally this can have a few exceptions as possible.
allowed_external_types = [
    "equivalent::Equivalent",
    "futures_sink::Sink", # TODO: This is a pre-1.0 crate, we can't easily stabilize with this in the public API
    "futures_core::stream::Stream",  # TODO: This is a pre-1.0 crate, we can't easily stabilize with this in the public API
]