Overview of features in Elixir v1.18.0-rc.0 Release

Elixir v1.18.0-rc.0 introduces exciting improvements focused on type system enhancements, testing capabilities, JSON support, and language server features. The type system now includes type checking of function calls, which enables developers to catch type errors more easily. ExUnit has been updated to support parameterized tests and test group management, enhancing testing flexibility. The new JSON support complies with relevant standards, offering seamless encoding and decoding. Additionally, improvements for language servers aim to optimize the compilation process by allowing different instances to communicate effectively, ensuring a smoother development experience. The release also addresses some potential incompatibilities and provides soft and hard deprecations to guide developers in adapting their code.