Issue #211
Add support for storing the metrics help text in the multiprocess map.
The help will come from the first process read, but it should be the
same for all metrics.

Signed-off-by: Cian Butler <[email protected]>

Reduce the initial mmap file size from 1MiB to 64KiB. This should reduce
the memory and disk overhead for larger numbers of multiprocess workers.

Signed-off-by: SuperQ <[email protected]>

Reduce the mmap minimum size

Signed-off-by: Radek Ježek <[email protected]>

Signed-off-by: Evgeny Markov <[email protected]>

Signed-off-by: Evgeny Markov <[email protected]>

…ng-content-type

Fix wrong encoder used with `application/openmetrics-text` accept header

Upgrade development dependencies, fix some types

If there is no delimiter separating the labels and value when parsing
the Prometheus format the parser currently will chop off the first digit
of the value. Instead, allow a missing delimiter in the Prometheus
format to align with what the Go parser does.

In addition, add a test to specifically check that a delimiter is still
required in OpenMetrics.

Signed-off-by: Chris Marchbanks <[email protected]>

The base image has also been moved to the new cimg repositories which
are direct replacements for circleci.

Signed-off-by: Chris Marchbanks <[email protected]>

Support metric help text in multiprocess mode

Allow Prometheus parser to handle missing space

Add tests for Python 3.11

Signed-off-by: kareza <[email protected]>

fix package name error

`ExceptionCounter.__exit__` kicks down to `isinstance`, which accepts
either a single type or a tuple of types (or in Python 3.10, a
UnionType).  Update type annotations to reflect this.

Signed-off-by: Jakob van Santen <[email protected]>

Allow tuples of exceptions in ExceptionCounter

Signed-off-by: Chris Marchbanks <[email protected]>