v0.40.1

Commits

• 1c65cff: Try to prevent panics in case of rename conflict with some additional reproduction conditions (for #98) (Vitaliy Filippov)
• cd13191: Symptomatically fix #101 - possible segfault in flusher (Vitaliy Filippov)
• 4d0b044: Add a test for files disappearing on delete during slurp (Vitaliy Filippov)
• c08a09b: Fix expiration during slurped directory loads (Vitaliy Filippov)
• cf8e574: Report conflict and stop upload retries when receiving a 404 from UploadPart (Vitaliy Filippov)
• 24f9d28: Release 0.40.1 (Vitaliy Filippov)