v0.40.0

Changelog

• adc6184 chore(deprecations): migrate from ioutil to io (#299)
• c93f5dc chore(deps): update module github.com/glebarez/go-sqlite to v1.18.1 (#295)
• e1a7600 chore(deps): update module github.com/swaggo/gin-swagger to v1.5.2 (#291)
• 66f8927 chore: improve error handling (#292)
• ea0c310 chore: relax test coverage threshold and update docs (#300)
• 542b678 feat: add budgeted sum for a month (#293)
• dbd093c feat: add shortcut to delete all allocations for a month (#296)
• a45877d feat: increase timestamp precision in logs (#297)
• d19e730 fix: add allocation month delete to Budgets group instead of new Budget group (#298)