Roadmap for v5.0

[agronholm]

My current plans for the next major release is as follows:

• @typechecked() will be changed back to wrapping the callable, so it's faster on import and works in the REPL again
• Instrumentation will no longer try to remove the quotes from type annotations, except in cases where it can be absolutely sure it's not doing any harm (thus fixing issues with custom annotations in jax-typing and others)
• The check_argument_types() and check_return_type() functions will make a comeback, as requested
• The default for config.collection_check_strategy will be switched back to checking all items instead of just the first one, as this has caused numerous bug reports
• I'll try to mitigate the issue of pytest instrumentation conflicting with Typeguard's in test suites