3.4.0

This rebar3 release contains a lot of fixes and patches to fun edge cases.

• Try to start epmd when distribution fails
• Allow non-default profile deps upgrade
• Switch default license in templates to Apache 2.0, and hook it up in the .app file
• Fix git SHA comparisons for dep update
• Let relx know about rebar-specified erl_opts
• Use rm_rf instead of ec_file:delete, fixing some deps-related issues on Windows
• Handle internal CT failures
• Fix profile merging of erl_first_files options
• Fix CT output in skipped test cases and failing end of function hooks
• Officially drop R15 support, since its SSL libs can no longer talk to hex.pm
• REBAR_COLOR supports all ec_cmd_log intensity options, allowing the none value to disable all colors without dropping termcap support
• Bump relx to 3.22.4

The one new feature supported here is for the interactive shell:

• Support commands in the shell such as r3:Command(), r3:Command("--args=as a string"), or r3:Command(Namespace, "--args=as a string"), instead of just r3:do(Command).