0.14.0

This release brings multiple new features and improvements. Read the Release Notes for more info.

Added

• pglr parse for parsing files and displaying parse trees and forests.
• pglr trace --frontier for organizing GSS nodes for GLR trace into
  frontiers (a.k.a. shift levels)
• to_dot on trees and forests for rendering GraphViz dot string. Used in
  pglr parse if --dot switch is provided to create dot file of a parse
  forest/tree.
• Parenthesized groups in grammar rules.
• New examples: JSON, BibTeX, Java (based on Jave SE 16).
• New performance tests based on the new example grammars.

Changed

• Changed tree_str on parse trees to to_str. (BIC)
• Improved GLR implementation. Improved performance.
• GLR parsing now returns Forest object which can be indexed and iterated
  yielding lazy trees. See Release Notes for more info. (BIC)
• Dropping support for deprecated Python 3.4 and 3.5 versions. (BIC)