v1.11.0

• Fix: Don't allow default export class by mistake (fixes #82) (Nicholas C. Zakas)
• Fix: Export default function should be FunctionDeclaration (fixes #81) (Nicholas C. Zakas)
• Fix: Ensure class declarations must have IDs outside of exports (refs #72) (Nicholas C. Zakas)
• Fix: export class expression support (refs #72) (Jamund Ferguson)
• Update: Add tests for sourceType=module (refs #72) (Nicholas C. Zakas)
• Fix: Class name should be id (fixes #78) (Nicholas C. Zakas)
• Fix: disallow import/export in functions (refs #72) (Jamund Ferguson)
• Test: strict mode enforced in modules (refs #72) (Jamund Ferguson)
• New: Add modules feature flag (refs #72) (Nicholas C. Zakas)
• merging upstream and solving conflicts for PR #43 (Caridy Patino)
• New: Add ES6 module support (fixes #35) (Caridy Patino)
• Update: Add TryStatement.handler (fixes #69) (Brandon Mills)
• Fix: Destructured Defaults (fixes #56) (Jamund Ferguson)
• Update: Refactor out comment attachment logic (Nicholas C. Zakas)