v0.12.1

Enhancements

• [ExUnit] Support :include and :exclude configuration options to filter which tests should run based on their tags. Those options are also supported via mix test as --include and --exclude
• [ExUnit] Allow doctests to match against #MyModule<>

Bug fixes

• [CLI] Abort when a pattern given to elixirc does not match any file
• [Float] Fix Float.parse/1 to handle numbers of the form "-0.x"
• [IEx] Improve error message for IEx.Helpers.r when module does not exist
• [Mix] Ensure deps.get updates origin if lock origin and dep origin do not match
• [Mix] Use relative symlinks in _build
• [Typespec] Fix conversion of unary ops from typespec format to ast
• [Typespec] Fix handling of tuple() and {}

Deprecations

• [Kernel] Do not leak clause heads. Previously, a variable defined in a case/receive head clauses would leak to the outer scope. This behaviour is deprecated and will be removed in the next release.
• [Kernel] Deprecate __FILE__ in favor of __DIR__ or __ENV__.file

Backwards incompatible changes

• [GenFSM] GenServer now stops on unknown event/sync_event requests
• [GenServer] GenServer now stops on unknown call/cast requests
• [Kernel] Change how -> is represented in AST. Now each clause is represented by its own AST node which makes composition easier. See commit 51aef55 for more information.