fluent 0.6.1 (February 6, 2018)

Various fixes to fluent.migrate for bug 1424682.

• Accept Patterns and PatternElements in REPLACE. (#41)

  REPLACE can now use Patterns, PatternElements and Expressions as
  replacement values. This makes REPLACE accept the same Transforms as
  CONCAT.

• Never migrate partial translations. (#44)

  Partial translations may break the AST because they produce
  TextElements with None values. For now, we explicitly skip any
  transforms which depend on at least one missing legacy string to avoid
  serialization errors.

• Warn about unknown FTL entries in transforms. (#40)

• Fix how files are passed to hg annotate. (#39)