Round-trip integration tests (#3)

- Implement round-trip tests for some cases.
- Run tests in CI.

Reviewed-on: #3

.editorconfig

@@ -12,5 +12,8 @@ tab_width = 4
 [{*.yaml,*.yml}]
 indent_size = 2
 
+[src/test/**/*]
+ktlint_standard_no-wildcard-imports = disabled
+
 [{*.kt,*.kts}]
 ij_kotlin_packages_to_use_import_on_demand = org.junit.jupiter.api,aws.sdk.kotlin.services.s3,kotlinx.coroutines,java.io,ziputils