Bump distillery from 2.0.12 to 2.1.0

[dependabot-preview]

Bumps distillery from 2.0.12 to 2.1.0.

Changelog

Sourced from distillery's changelog.

[2.1.0] - Unreleased

Breaking Changes

• In order to be compatible with Elixir 1.9, Mix tasks have been renamed:
  • mix distillery.release
  • mix distillery.release.clean
  • mix distillery.init
  • mix distillery.gen.appup
• Additionally, all public APIs that used the Mix.Releases namespace are now
  under the Distillery.Releases namespace, notably this affects plugin modules,
  config providers, and rel/config.exs config files.

[2.0.3]

Added

• Added --mfa flag to rpc and eval commands, which specifies a module/function/arity
  string to apply, using arguments provided to the command. Arguments are not transformed in
  any way, but applied as string values. You can also pass --argv with --mfa to change the
  behavior such that all arguments are passed as a single list of arguments, much like you'd get
  in a Mix task; using --argv implies an arity of 1, so if you pass an mfa string with a different
  arity, an error will be returned.

[2.0.0]

This is a major release with a number of significant changes and some of which are breaking,
please read these notes carefully! There are a great many improvements and bug
fixes. Unfortunately the bug fixes are so numerous that I can't list them all
here, but if you are interested, the git history is clean, and should
provide a good overview of what has been addressed.

Added

• The Mix.Releases.Config.Provider behavior and API. Referred to as
  "Config Providers" in more general terms, this provides a format and source
  agnostic way to configure your application at runtime. Providers are executed
  prior to boot/init, in an environment with all application code loaded, with
  only kernel, stdlib, compiler, and elixir applications started.
  They are executed in the order listed in
  your config, and should push their configuration into the application
  environment (e.g. via Application.put_env/3). It is expected that when
  running multiple providers, the last one to run "wins" in the case of
  conflicting configuration keys, so they should be ordered by their priority.
• A Mix.Config config provider, supporting config.exs scripts in releases.
  You can find more information in the Mix.Releases.Config.Providers.Elixir
  module docs, or in the Distillery documentation about config providers.
• A new config_providers setting for defining which config providers to
  execute in a release (can be set in either environment or release blocks).
• Support for writing a PID file to disk (useful for running under systemd in

... (truncated)

Commits

• 47cbbfb Stop post start subshell ending up as a zombie (#675)
• 86781d0 Quote the boot script with single quotes (#676)
• 7d1cb2d Ensure RELEASE_MUTABLE_DIR exists before writing to it (#679)
• 3832483 Fix REL_DIR in documentation (#681)
• ce5b329 Set up args for win32 install task properly
• c61918f Fix #652 - improper handling of consolidated protocols on win32
• 621b6f7 Set -data to point to mutable start_erl.data on win32
• 4ebfe9a Address #670 - Improvements to read-only support
• 21101b3 Fixes generated rel/config.exs when release name is not provided. (#667)
• 5859710 Fix compilation error (#666)
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #7.