bump to support lazer schema version 41 (no changes needed)

Signed-off-by: Ookiineko <chiisaineko@protonmail.com>

add LICENSE file from upstream BeatmapExporter

- didn't add myself since i did nothing

Signed-off-by: Ookiineko <chiisaineko@protonmail.com>

bump to schema version 30 (no changes needed)

bump to schema version 29 (no changes needed)

bump to schema version 28 (no changes needed)

close db & catch IOException

Signed-off-by: Ookiineko <chiisaineko@protonmail.com>

Add other source files

Signed-off-by: Ookiineko <chiisaineko@protonmail.com>