v 0.20.0

Language

• New string template syntax `This is text with {{% expression %}} and more text`
• Support for enumerated values, with proper typing and pattern matching support #3
• Expression sublanguage for modifying state #143

Standard Library

• New encode and decode functions
• New format function for DateTime
• New getOptions function which returns global static options for the compiler (e.g., wrapVariables)

Bug fixes

• now is no longer a magic variable (https://github.com/accordproject/ergo/issues/642)
• toString now properly format numeric values based on their types (https://github.com/accordproject/ergo/issues/575)
• constants are now properly imported and scoped, and can be accessed using an explicit namespace (https://github.com/accordproject/ergo/issues/465)
• Cicero target properly includes type hierarchy (https://github.com/accordproject/ergo/issues/644)
• Type soundness of match expression (https://github.com/accordproject/ergo/issues/645)