v6.0.0-rc.1

Improvements

• feat: handle special cond import for shared module by @huozhi in #602
• fix directive appending by @huozhi in #604
• feat: valid if files containing exports by @huozhi in #606
• fix: resolve variable by @huozhi in #607

Full Changelog: v6.0.0-rc.0...v6.0.0-rc.1