Fix bash/sh incompatibility

Fixes issue #923 that seems to occur when running sh shells when bash is also present on the system.
The problem occurs when sourcing the auto-completion script for bash.

Migrate from Travis and DigitalOcean spaces to Github

Migration away from:

• Travis CI for all CLI builds (stable and beta)
• DigitialOcean spaces in favour of GitHub Releases
• Clean up all remnants of old builds.

Replace completion command with automatic inference

• Remove the completion command
• Source appropriate bash/zsh completion script
• Completion is driven by sdkman_auto_complete config
• Backward compatibility for completion command

Fix completion bug

A tactical fix for #912

Bash completion enhancements

The bash-completion script now supports:

• current
• home
• default
• uninstall
• upgrade
• list

Bug fix for ZSH issue

This fixes issue #893 experienced by our ZSH users. Thanks @helpermethod for the patch!

Completion improvements

Feature enhancements:

• Adds ZSH completion
• Improves bash completion

Test stability:

• Fixes broken tests on OSX
• Make tests more deterministic

This release had a defect, and we rolled back to 5.11.0 in the interim.

New `completion` command and other improvements

This release has the following new features and improvements:

• #860 Add a new completion command 🎉
• #859 Improved UX by providing helpful hints when version not available
• #863 Fixes an issue with regard to the env command

Add Rosetta 2 feature toggle for Silicon Mac

Adds a new config sdkman_rosetta2_compatbile to .sdkman/etc/config for switching on/off Rosetta 2 compatibility mode:

• is exclusive, either x86_64 or arm64
• chooses x86_64 + Rosetta 2 by default
• can be switched to false to use native JDKs
• Only Azul Zulu arm64 JDKs available
• interim solution until more vendors release native arm64 JDKs

Silicon Mac support and env install subcommand

This release contains several new features and some other improvements and fixes:

• platform inference for ARM64 Mac architecture
• adds sdk env install subcommand
• display helpful tip when version not found for platform
• only sources .sh files on initialization