Merge pull request #2267 from fishcakez/application_error

Rename Application.format_reason/1 to format_error
Bump hex requirement
Release v0.13.2
Start v0.13.3-dev
Remove deprecated code
Deprecate code that was previously soft-deprecated
Always filter children of remote dependencies
Format EXIT signals consistently
Mention ERL_COMPILER_OPTIONS and rename ELIXIR_ERL_OPTS to ELIXIR_ERL_OPTIONS

Closes #2271
Merge pull request #2270 from fishcakez/format_banner_EXIT

Format EXIT signals consistently
Update exit signals in Exception to {:EXIT, pid}
List all soft deprecations that have become deprecated
Merge xgen and soft deprecate existing behaviours
Rename some Makefile targets. Closes #2274

kernel -> core
test_kernel -> test_stdlib
Merge pull request #2275 from alco/makefile-rename-kernel

Rename some Makefile targets. Closes #2274
core -> stdlib in makefile
Properly handle non-boolean values for boolean options
Add more sanity-check tests for OptionParser
Don’t ignore values for ‘--no-*’ options
Format OptionParser tests more nicely