0.15.0

• Updates to deepmind/kapitan:ci Docker image
• kapitan secrets --write and kapitan secrets --update-targets are now consistent in terms of the recipients list #67
• Significant performance improvement to kapitan compile #71
• kapitan compile now writes the version to .kapitan and future executions will check if the last used kapitan version is <= than the current kapitan version, to keep compilations consistent. You can skip version check by doing kapitan compile --ignore-version-check. For more info see #57 and #72