v1.12.0

• Fix: Update broken tests (Nicholas C. Zakas)
• New: Add sourceType to Program node (fixes #93) (Nicholas C. Zakas)
• Allow spread in more places (fixes #89) (Nicholas C. Zakas)
• Fix: Deeply nested template literals (fixes #86) (Nicholas C. Zakas)
• Fix: Allow super in classes by default (fixes #87) (Nicholas C. Zakas)
• Fix: generator methods in classes (fixes #85) (Jamund Ferguson)
• Remove XJS note from Esprima-FB incompatibilities (Joe Lencioni)