@fluent/bundle 0.16.0

• Rename FluentArgument to FluentVariable. (#499)

  FluentVariable is a TypeScript-only type definition used to describe
  value types which can be passed as variables to translations.

• Remove compat.js builds and compile everything to ES2018. (#472)

  TypeScript source code is now compiled to ES2018 files in the esm/
  directory. These files are then bundled into a single index.js UMD file
  without any further transpilation.

  The compat.js build (available as @fluent/bundle/compat) was removed.
  Please use your own transpilation pipeline if ES2018 is too recent for
  your project.

  Refer to https://github.com/projectfluent/fluent.js/wiki/Compatibility
  for more information.