prepare for 2.16.1 release (zarr-developers#1503)

updated release notes for 2.16.0 (zarr-developers#1471)

2.15.0: Remove pre-release warning (zarr-developers#1419)

`open_array()`: adding the `meta_array` argument (zarr-developers#1396)

* open_array(): adding the meta_array argument

* updated release.txt

* doc: fixed versionadded

Mark for 2.15.0a1 pre-release (zarr-developers#1404)

* Mark for 2.15.0a1 pre-release

* Move warning down

Ensure `zarr.group` uses writable mode (zarr-developers#1354)

* Fix creating a group with fsmap per issue zarr-developers#1353, regression test added

* Update release notes

Fix 2.14.0 redirects (zarr-developers#1346)

* Fix 2.14.0 redirects

Check for hash in anchormap

* Add release notes

* Add note about conda-forge release

Prepare 2.14 changelog (zarr-developers#1337)

* Prepare 2.14 changelog

* .rst fixes

Bump pypi action (zarr-developers#1320)

2.13.4 and 2.13.5 were not released due to the following error:

```
Error: Unable to resolve action `pypa/gh-action-pypi-publish@v1`, unable to find version `v1`
```

Ensure `zarr.create` uses writeable mode (zarr-developers#1309)

* Ensure zarr.create uses writeable mode

* Update release.rst

Added release notes for [zarr-developers#1309](zarr-developers#1309)

* Switch to bug fix

Co-authored-by: Josh Moore <[email protected]>
Co-authored-by: Sanket Verma <[email protected]>