v21.06.00

🐛 Bug Fixes

• FindThrust now guards against multiple inclusion by different consumers (#784) @robertmaynard

📖 Documentation

• Document synchronization requirements on device_buffer copy ctors (#772) @harrism

🚀 New Features

• add a resource adapter to align on a specified size (#768) @rongou

🛠️ Improvements

• Update environment variable used to determine cuda_version (#785) @ajschmidt8
• Update CHANGELOG.md links for calver (#781) @ajschmidt8
• Merge branch-0.19 into branch-21.06 (#779) @ajschmidt8
• Update docs build script (#776) @ajschmidt8
• upgrade spdlog to 1.8.5 (#658) @rongou