v0.20.0

Added

• String literal hash keys are now marked as frozen as static literal.
• IndexTargetNode now always has the ATTRIBUTE_WRITE flag.
• Call*Node nodes now have an IGNORE_VISIBILITY flag.
• We now support the it default parameter.
• Errors and warnings now have levels associated with them.
• Symbols now have correct encoding flags.
• We have now merged parser-prism in, which provides translation to the whitequark/parser AST.
• We now emit errors for invalid method definition receivers.

Changed

• We now emit errors on invalid pinned local variables.
• When passed scopes, it is now assumed that the innermost scope is the current binding.
• We now provide better error recovery for non terminated heredocs.
• Fix for RationalNode#value for non-decimal integers.
• Unary symbols !@ and ~@ now unescape to ! and ~, respectively.
• frozen_string_literal: false now works properly.

Removed

• We've removed the locals_body_index field.
• We've removed the verbose option on the various parse APIs. Warnings are now always emitted with their associated level so that consumers can decide how to handle them.