v3.15.0

Added:

• Conda smithy will now detect if a recipe uses compiler('cuda')
  and set the CF_CUDA_ENABLED environment variable to True if
  so. This can for example be useful to distinguish different options
  for builds with or without GPUs in conda_build_config.yaml.
• Introduce utility function to facilitate the use case of running conda smithy
  commands from any sub-directory in the git repo checkout of a feedstock.

Fixed:

• Fixed typo in GitHub Actions template, where DOCKERIMAGE was wrongly specified in the matrix configuration. The CI step and its corresponding script expect DOCKER_IMAGE.

Authors:

• Isuru Fernando
• Jaime Rodríguez-Guerra
• H. Vetinari
• Nehal J Wani