Release v2.0.0-alpha.10

a0b8f2b Test the trust-dns
f2d7bad async Mutex
b910ff3 CI: Unlock Rust nightly version
260cd50 Upgrade to tokio 1.0
17b92e7 Upgrade to the new tbot
3c8b1c6 Update tbot, we can upgrade to tokio 1.0 now
4c2adfb dependabot: remove all ignored, set interval to weekly
b7d8d0d Use atomicwrites to save data file safely
36f77b5 Rewrite the multi-user mode
d2c7f08 feat: Support multi-user mode
d098c6e Bump is-macro to v0.1.9, fixed "expected enum, found tuple"
9a8d591 Revert dbfafc9
ccde097 Upgrade to GitHub-native Dependabot
09539e4 Refactor module structure
adeebf0 Fix the channel checking message in /rss command
3146dd3 Fix tbot deprecated warnings
29b77fb Remove the leftover dbg!
6cf7bfb Add --restricted