Complete process for libEnsemble release 1.6.0

[shuds13]

Release is on PyPI, but is delayed on the following platforms as gest-api packages are missing.

• Need licence in gest-api: https://github.com/campa-consortium/gest-api (discuss - this is the blocker)
• Conda gest-api conda-forge package to be created from meta.yaml - see below (need gest-api licence)
• Update/merge libensemble conda-forge PR to have gest-api dep. libensemble v1.6.0 conda-forge/libensemble-feedstock#52
• Spack gest-api PR to be pulled in: Add gest-api package spack/spack-packages#3659
• Update libensemble Spack package

[shuds13]

For conda-forge gest-api, create a meta.yml and push to https://github.com/conda-forge/staged-recipes/

Correct licence/maintainers as needed

e.g.,

{% set name = "gest-api" %}
{% set version = "0.1" %}

package:
  name: {{ name|lower }}
  version: {{ version }}

source:
  url: https://pypi.org/packages/source/{{ name[0] }}/{{ name }}/gest_api-{{ version }}.tar.gz
  sha256: c5712721072fab8fdef7e976d4140db99729245f34ff36eefc0737c5197d25a8

build:
  noarch: python
  number: 0
  script: {{ PYTHON }} -m pip install . -vv --no-deps --no-build-isolation

requirements:
  host:
    - python >=3.10
    - pip
    - setuptools
  run:
    - python >=3.10
    - pydantic

test:
  imports:
    - gest_api
    - gest_api.vocs
    - gest_api.generator

about:
  home: https://gest-api.readthedocs.io
  summary: A standard for generating test points and exchanging variables, objectives, and constraints in optimization problems
  license: BSD-3-Clause
  license_file: LICENSE

extra:
  recipe-maintainers:
    - shuds13
    - jlnav